US6088038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for mapping colors between imaging systems and method therefor
Assignee: Kodak Graphics Holding Inc
•
Filing: 1997-07-03
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Granted: 2000-07-11
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Expires: 2017-07-03
Abstract
Abstract A color mapping method is used in transforming colors between color imaging systems. The method includes using forward transformation profiles that characterize the color imaging systems to generate respective sets of device-independent color values for the color imaging systems. Color conversions are calculated by recursively reducing differences between the respective sets of device-independent color values. Based on these color conversions, a color map is constructed that describes a relationship between the color imaging systems.
Inventors
- 👤 Christopher J. Edge
- 👤 Timothy A. Fischer
- 👤 William A. Rozzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:47
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/6058; H04N1/603; H04N1/6052
Claims Analysis
Total Claims: 59
Claim 1
Independent Claim
159 words
A method for transforming colors between source and destination color imaging systems, the method comprising: using forward transformation profiles that characterize the source and destination color imaging systems to generate respective sets of device-independent color values for the source and destination color imaging systems; calculating color conversions for different combinations of source and destination color imaging systems by iteratively reducing differences between the respective sets of device-independent color values; constructing color maps describing relationships between the different combinations of source and destination color imaging systems using the color conversions and user preferences; storing the color maps; and when a user requests a transformation for a selected combination of the source and destination color imaging systems and selected user preferences: determining whether one of the color maps corresponds to the selected combination and the selected user preferences, if so, retrieving the corresponding color map, and if not, constructing a new color map for the selected combination and selected user preferences.
Claim 2
Independent Claim
159 words
A method for transforming colors between source and destination color imaging systems, the method comprising: using forward transformation profiles that characterize the source and destination color imaging systems to generate respective sets of device-independent color values for the source and destination color imaging systems; calculating color conversions for different combinations of source and destination color imaging systems by iteratively reducing differences between the respective sets of device-independent color values; constructing color maps describing relationships between the different combinations of source and destination color imaging systems using the color conversions and user preferences; storing the color maps; and when a user requests a transformation for a selected combination of the source and destination color imaging systems and selected user preferences: determining whether one of the color maps corresponds to the selected combination and the selected user preferences, if so, retrieving the corresponding color map, and if not, constructing a new color map for the selected combination and selected user preferences.
Claim 3
Dependent Claim
15 words
A method, according to claim 1, further comprising iteratively reducing differences between black channel information.
Claim 4
Dependent Claim
17 words
A method, according to claim 1, further comprising using an error function for calculating the color conversions.
Claim 5
Dependent Claim
24 words
A method, according to claim 1, further comprising configuring at least one of the profiles to account for certain perceptual effects on color appearance.
Claim 6
Dependent Claim
23 words
A method, according to claim 1, wherein the color map comprises at least one of the following: a lookup table, and an equation.
Claim 7
Independent Claim
171 words
A method for transforming colors between source and destination color imaging systems, a method comprising: using profiles that characterize the color imaging systems to generate device-independent color values for the source color imaging system, the device-independent color values having a same dimensionality as the source color imaging system to generate black channel values independently of other color channel values; using the profiles to perform a color conversion for converting the device-independent color values to device-dependent values of the destination color imaging system; using the color conversion and user preferences to define a color map for transforming colors between the color imaging systems; applying the color map to transform colors between the color imaging systems in the event the color map was defined based on existing user preferences; and in the event the color map was not defined based on the existing user preferences, using the color conversion and the existing user preferences to redefine the color map, and applying the redefined color map to transform colors between the color imaging systems.
Claim 8
Independent Claim
171 words
A method for transforming colors between source and destination color imaging systems, a method comprising: using profiles that characterize the color imaging systems to generate device-independent color values for the source color imaging system, the device-independent color values having a same dimensionality as the source color imaging system to generate black channel values independently of other color channel values; using the profiles to perform a color conversion for converting the device-independent color values to device-dependent values of the destination color imaging system; using the color conversion and user preferences to define a color map for transforming colors between the color imaging systems; applying the color map to transform colors between the color imaging systems in the event the color map was defined based on existing user preferences; and in the event the color map was not defined based on the existing user preferences, using the color conversion and the existing user preferences to redefine the color map, and applying the redefined color map to transform colors between the color imaging systems.
Claim 9
Dependent Claim
15 words
A method, according to claim 6, wherein the color conversion is performed at least twice.
Claim 10
Dependent Claim
31 words
A method, according to claim 6, further comprising: using the color conversion to evaluate its accuracy at least once; and revising the color conversion at least once to improve its accuracy.
Claim 11
Dependent Claim
206 words
For use in transforming colors between source and destination color imaging systems, a method comprising: (a) using profiles characterizing the color imaging systems to generate device-independent color values for the source color imaging system, the device-independent color values having a same dimensionality as the source color imaging system to generate black channel values independently of other color channel values; (b) using the profiles to perform a color conversion for converting the device-independent color values to device-dependent values of the destination color imaging system; (c) using the color conversion to improve the accuracy of the color conversion relative to a quality threshold; (d) returning to step (c) until the color conversion satisfies the quality threshold; (e) using the color conversion and user preferences to define a color map for transforming colors between the color imaging systems; (f) using the color map to transform colors between the color imaging systems in the event the color map was defined based on existing user preferences; and (g) in the event the color map was not defined based on the existing user preferences, using the color conversion and the existing user preferences to redefine the color map, and applying the redefined color map to transform colors between the color imaging systems.
Claim 12
Dependent Claim
206 words
For use in transforming colors between source and destination color imaging systems, a method comprising: (a) using profiles characterizing the color imaging systems to generate device-independent color values for the source color imaging system, the device-independent color values having a same dimensionality as the source color imaging system to generate black channel values independently of other color channel values; (b) using the profiles to perform a color conversion for converting the device-independent color values to device-dependent values of the destination color imaging system; (c) using the color conversion to improve the accuracy of the color conversion relative to a quality threshold; (d) returning to step (c) until the color conversion satisfies the quality threshold; (e) using the color conversion and user preferences to define a color map for transforming colors between the color imaging systems; (f) using the color map to transform colors between the color imaging systems in the event the color map was defined based on existing user preferences; and (g) in the event the color map was not defined based on the existing user preferences, using the color conversion and the existing user preferences to redefine the color map, and applying the redefined color map to transform colors between the color imaging systems.
Claim 13
Dependent Claim
164 words
For use in transforming colors between source and destination color imaging systems, a system comprising: means for using forward transformation profiles that characterize the source and destination color imaging systems to generate respective sets of device-independent color values for the source and destination color imaging systems; means for calculating color conversions for different combinations of source and destination color imaging systems by iteratively reducing differences between the corresponding sets of device-independent color values; means for constructing color maps describing relationships between the different combinations of source and destination color imaging systems using the color conversions and user preferences; storing the color maps; and when a user requests a transformation for a selected combination of the source and destination color imaging systems and selected user preferences: determining whether one of the color maps corresponds to the selected combination and selected user preferences, if so, retrieving the corresponding color map, and if not, constructing a new color map for the selected combination and selected user preferences.
Claim 14
Dependent Claim
164 words
For use in transforming colors between source and destination color imaging systems, a system comprising: means for using forward transformation profiles that characterize the source and destination color imaging systems to generate respective sets of device-independent color values for the source and destination color imaging systems; means for calculating color conversions for different combinations of source and destination color imaging systems by iteratively reducing differences between the corresponding sets of device-independent color values; means for constructing color maps describing relationships between the different combinations of source and destination color imaging systems using the color conversions and user preferences; storing the color maps; and when a user requests a transformation for a selected combination of the source and destination color imaging systems and selected user preferences: determining whether one of the color maps corresponds to the selected combination and selected user preferences, if so, retrieving the corresponding color map, and if not, constructing a new color map for the selected combination and selected user preferences.
Claim 15
Dependent Claim
200 words
For use in transforming colors between first and second color imaging systems respectively using first and second color coordinate systems, a method comprising: (a) generating first device-independent color coordinates as a function of color coordinates in the first color coordinate system; (b) estimating preliminary color coordinates in the second color coordinate system; (c) generating second device-independent color coordinates as a function of the preliminary color coordinates; (d) adjusting the preliminary color coordinates to reduce an error between the first and second device-independent color coordinates; (e) returning to step (a) until the error satisfies a quality threshold; (f) constructing a color map describing a relationship between the first and second color imaging systems as a function of the adjusted color coordinates and user preferences; (g) using the color map to transform colors between the first and second color imaging systems in the event the color map was defined based on existing user preferences; and (h) in the event the color map was not defined based on the existing user preferences, using the color conversion and the existing user preferences to redefine the color map, and applying the redefined color map to transform colors between the first and second color imaging systems.
Claim 16
Dependent Claim
200 words
For use in transforming colors between first and second color imaging systems respectively using first and second color coordinate systems, a method comprising: (a) generating first device-independent color coordinates as a function of color coordinates in the first color coordinate system; (b) estimating preliminary color coordinates in the second color coordinate system; (c) generating second device-independent color coordinates as a function of the preliminary color coordinates; (d) adjusting the preliminary color coordinates to reduce an error between the first and second device-independent color coordinates; (e) returning to step (a) until the error satisfies a quality threshold; (f) constructing a color map describing a relationship between the first and second color imaging systems as a function of the adjusted color coordinates and user preferences; (g) using the color map to transform colors between the first and second color imaging systems in the event the color map was defined based on existing user preferences; and (h) in the event the color map was not defined based on the existing user preferences, using the color conversion and the existing user preferences to redefine the color map, and applying the redefined color map to transform colors between the first and second color imaging systems.
Claim 17
Dependent Claim
24 words
A method, according to claim 11, further comprising using the color coordinates in the first color coordinate system to estimate the preliminary color coordinates.
Claim 18
Dependent Claim
162 words
For use in transforming colors between color imaging systems, a system comprising: a computer arrangement programmed to use forward transformation profiles that characterize the color imaging systems to generate respective sets of device-independent color values for the color imaging systems, calculate color conversions by iteratively reducing differences between the sets of device-independent color values, and construct a color map describing a relationship between the color imaging systems using the color conversions and user preferences; and a memory, configured and arranged to store the color map, wherein the computer arrangement is further programmed to: use the color map to transform colors between the color imaging systems in the event the color map was defined based on existing user preferences; and in the event the color map was not defined based on the existing user preferences, using the color conversion and the existing user preferences to redefine the color map, and applying the redefined color map to transform colors between the color imaging systems.
Claim 19
Dependent Claim
162 words
For use in transforming colors between color imaging systems, a system comprising: a computer arrangement programmed to use forward transformation profiles that characterize the color imaging systems to generate respective sets of device-independent color values for the color imaging systems, calculate color conversions by iteratively reducing differences between the sets of device-independent color values, and construct a color map describing a relationship between the color imaging systems using the color conversions and user preferences; and a memory, configured and arranged to store the color map, wherein the computer arrangement is further programmed to: use the color map to transform colors between the color imaging systems in the event the color map was defined based on existing user preferences; and in the event the color map was not defined based on the existing user preferences, using the color conversion and the existing user preferences to redefine the color map, and applying the redefined color map to transform colors between the color imaging systems.
Claim 20
Dependent Claim
23 words
A system, according to claim 13, wherein the computer arrangement is further programmed to use an error function for calculating the color conversions.
Claim 21
Dependent Claim
30 words
A system, according to claim 13, wherein the computer arrangement is further programmed to configure at least one of the profiles to account for certain perceptual effects on color appearance.
Claim 22
Dependent Claim
27 words
A system, according to claim 13, wherein the computer arrangement is further programmed to construct at least one of the following: a lookup table, and an equation.
Claim 23
Dependent Claim
42 words
A system, according to claim 13, wherein the computer arrangement is further programmed to detect respective types of color imaging devices between which a color transformation is to be performed, and in response to the detected types, select a stored color map.
Claim 24
Dependent Claim
169 words
For use in transforming colors between source and destination color imaging systems, a data storage medium storing a computer-executable program that, when executed, uses forward transformation profiles that characterize the source and destination color imaging systems to generate respective sets of device-independent color values for the source and destination color imaging systems; calculates color conversions for different combinations of source and destination color imaging systems by iteratively reducing differences between the respective sets of device-independent color values; constructs color maps describing relationships between the different combinations of source and destination color imaging systems using the color conversions and user stores the stores the color maps; and when a user requests a transformation for a selected combination of the source and destination color imaging systems and selected user preferences: determines whether one of the color maps corresponds to the selected combination and the selected user preferences, if so, retrieves the corresponding color map, and if not, constructs a new color map for the selected combination and the selected user preferences.
Claim 25
Dependent Claim
169 words
For use in transforming colors between source and destination color imaging systems, a data storage medium storing a computer-executable program that, when executed, uses forward transformation profiles that characterize the source and destination color imaging systems to generate respective sets of device-independent color values for the source and destination color imaging systems; calculates color conversions for different combinations of source and destination color imaging systems by iteratively reducing differences between the respective sets of device-independent color values; constructs color maps describing relationships between the different combinations of source and destination color imaging systems using the color conversions and user stores the stores the color maps; and when a user requests a transformation for a selected combination of the source and destination color imaging systems and selected user preferences: determines whether one of the color maps corresponds to the selected combination and the selected user preferences, if so, retrieves the corresponding color map, and if not, constructs a new color map for the selected combination and the selected user preferences.
Claim 26
Dependent Claim
19 words
A data storage medium, according to claim 18, wherein the computer-executable program recursively reduces differences between black channel information.
Claim 27
Dependent Claim
21 words
A data storage medium, according to claim 18, wherein the computer-executable program uses an error function for calculating the color conversions.
Claim 28
Dependent Claim
28 words
A data storage medium, according to claim 18, wherein the computer-executable program configures at least one of the profiles to account for certain perceptual effects on color appearance.
Claim 29
Dependent Claim
25 words
A data storage medium, according to claim 18, wherein the computer-executable program generates at least one of the following: a lookup table, and an equation.
Claim 30
Dependent Claim
14 words
The method of claim 1, wherein the user preferences include illuminant and observer conditions.
Claim 31
Dependent Claim
24 words
The method of claim 1, wherein the user preferences include illuminant conditions, observer conditions, a selected gamut mapping, and a selected device-independent color space.
Claim 32
Dependent Claim
14 words
The method of claim 6, wherein the user preferences include illuminant and observer conditions.
Claim 33
Dependent Claim
24 words
The method of claim 6, wherein the user preferences include illuminant conditions, observer conditions, a selected gamut mapping, and a selected device-independent color space.
Claim 34
Dependent Claim
14 words
The method of claim 9, wherein the user preferences include illuminant and observer conditions.
Claim 35
Dependent Claim
24 words
The method of claim 9, wherein the user preferences include illuminant conditions, observer conditions, a selected gamut mapping, and a selected device-independent color space.
Claim 36
Dependent Claim
14 words
The method of claim 10, wherein the user preferences include illuminant and observer conditions.
Claim 37
Dependent Claim
24 words
The method of claim 10, wherein the user preferences include illuminant conditions, observer conditions, a selected gamut mapping, and a selected device-independent color space.
Claim 38
Dependent Claim
14 words
The method of claim 11, wherein the user preferences include illuminant and observer conditions.
Claim 39
Dependent Claim
24 words
The method of claim 11, wherein the user preferences include illuminant conditions, observer conditions, a selected gamut mapping, and a selected device-independent color space.
Claim 40
Dependent Claim
14 words
The system of claim 13, wherein the user preferences include illuminant and observer conditions.
Claim 41
Dependent Claim
24 words
The system of claim 13, wherein the user preferences include illuminant conditions, observer conditions, a selected gamut mapping, and a selected device-independent color space.
Claim 42
Dependent Claim
16 words
The data storage medium of claim 18, wherein the user preferences include illuminant and observer conditions.
Claim 43
Dependent Claim
26 words
The data storage medium of claim 18, wherein the user preferences include illuminant conditions, observer conditions, a selected gamut mapping, and a selected device-independent color space.
Claim 44
Independent Claim
223 words
A method for transforming color values between source and destination color imaging devices, the method comprising: providing forward transformation profiles for a plurality of color imaging devices, each of the forward transformation profiles defining a transformation of device-dependent color values to device-independent color values for the corresponding color imaging device; specifying transformations of color values by designating combinations of the color imaging devices as source and destination color imaging devices; applying the forward transformation profile for each of the source color imaging devices to produce corresponding source device-independent color values; applying the forward transformation profile for each of the destination color imaging devices to produce corresponding destination device-independent color values; reducing error between the source and destination device-independent color values for selected combinations of source and destination color imaging devices to generate color conversions; generating device links based on the color conversions, each of the device links defining a transformation of color values for one of the combinations of source and destination color imaging devices; storing the device links; when a user requests transformation for a selected combination of the source and destination color imaging systems: determining whether one of the stored device links corresponds to the selected combination, if so, applying the corresponding device link to provide the requested transformation, and if not, constructing a new device link for the selected combination.
Claim 45
Independent Claim
223 words
A method for transforming color values between source and destination color imaging devices, the method comprising: providing forward transformation profiles for a plurality of color imaging devices, each of the forward transformation profiles defining a transformation of device-dependent color values to device-independent color values for the corresponding color imaging device; specifying transformations of color values by designating combinations of the color imaging devices as source and destination color imaging devices; applying the forward transformation profile for each of the source color imaging devices to produce corresponding source device-independent color values; applying the forward transformation profile for each of the destination color imaging devices to produce corresponding destination device-independent color values; reducing error between the source and destination device-independent color values for selected combinations of source and destination color imaging devices to generate color conversions; generating device links based on the color conversions, each of the device links defining a transformation of color values for one of the combinations of source and destination color imaging devices; storing the device links; when a user requests transformation for a selected combination of the source and destination color imaging systems: determining whether one of the stored device links corresponds to the selected combination, if so, applying the corresponding device link to provide the requested transformation, and if not, constructing a new device link for the selected combination.
Claim 46
Dependent Claim
84 words
The method of claim 37, further comprising: constructing the device links based on both the color conversions and user preferences; and when a user requests a transformation for a selected combination of the source and destination color imaging systems: accepting selected user preferences; determining whether one of the device links corresponds to the selected combination and the selected user preferences, if so, retrieving the corresponding device link, and if not, constructing a new device link for the selected combination and the selected user preferences.
Claim 47
Dependent Claim
14 words
The method of claim 38, wherein the user preferences include illuminant and observer conditions.
Claim 48
Dependent Claim
24 words
The method of claim 38, wherein the user preferences include illuminant conditions, observer conditions, a selected gamut mapping, and a selected device-independent color space.
Claim 49
Dependent Claim
220 words
A data storage medium storing a computer program that, when executed: accesses forward transformation profiles for a plurality of color imaging devices, each of the forward transformation profiles defining a transformation of device-dependent color values to device-independent color values for the corresponding color imaging device; processes information specifying transformations of color values by designating combinations of the color imaging devices as source and destination color imaging devices; applies the forward transformation profile for each of the source color imaging devices to produce corresponding source device-independent color values; applies the forward transformation profile for each of the destination color imaging devices to produce corresponding destination device-independent color values; reduces error between the source and destination device-independent color values for selected combinations of source and destination color imaging devices to generate color conversions; generates device links based on the color conversions, each of the device links defining a transformation of color values for one of the combinations of source and destination color imaging devices; stores the device links; when a user requests transformation for a selected combination of the source and destination color imaging systems: determines whether one of the stored device links corresponds to the selected combination, if so, applies the corresponding device link to provide the requested transformation, and if not, constructs a new device link for the selected combination.
Claim 50
Dependent Claim
220 words
A data storage medium storing a computer program that, when executed: accesses forward transformation profiles for a plurality of color imaging devices, each of the forward transformation profiles defining a transformation of device-dependent color values to device-independent color values for the corresponding color imaging device; processes information specifying transformations of color values by designating combinations of the color imaging devices as source and destination color imaging devices; applies the forward transformation profile for each of the source color imaging devices to produce corresponding source device-independent color values; applies the forward transformation profile for each of the destination color imaging devices to produce corresponding destination device-independent color values; reduces error between the source and destination device-independent color values for selected combinations of source and destination color imaging devices to generate color conversions; generates device links based on the color conversions, each of the device links defining a transformation of color values for one of the combinations of source and destination color imaging devices; stores the device links; when a user requests transformation for a selected combination of the source and destination color imaging systems: determines whether one of the stored device links corresponds to the selected combination, if so, applies the corresponding device link to provide the requested transformation, and if not, constructs a new device link for the selected combination.
Claim 51
Dependent Claim
95 words
The data storage medium of claim 41, wherein, when executed, the computer program: constructs the device links based on both the color conversions and user preferences; and when a user requests a transformation for a selected combination of the source and destination color imaging systems: accepts selected user preferences; determines whether one of the device links corresponds to the selected combination and the selected user preferences, if so, applies the corresponding device link to provide the requested transformation, and if not, constructs a new device link for the selected combination and the selected user preferences.
Claim 52
Dependent Claim
16 words
The data storage medium of claim 42, wherein the user preferences include illuminant and observer conditions.
Claim 53
Dependent Claim
25 words
The data storage of claim 42, wherein the user preferences include illuminant conditions, observer conditions, a selected gamut mapping, and a selected device-independent color space.
Claim 54
Independent Claim
113 words
A method for transforming color values between source and destination color imaging devices, the method comprising: applying forward transformation profiles to transform device-dependent color values to device-independent color values for various source and destination color imaging devices; reducing error between the source and destination device-independent color values for selected combinations of source and destination color imaging devices; generating device links based on the error reduction, each of the device links defining a transformation of color values for one of the combinations of source and destination color imaging devices; and applying, for a selected combination of source and destination color imaging devices, a corresponding device link to transform color values for the selected combination.
Claim 55
Independent Claim
113 words
A method for transforming color values between source and destination color imaging devices, the method comprising: applying forward transformation profiles to transform device-dependent color values to device-independent color values for various source and destination color imaging devices; reducing error between the source and destination device-independent color values for selected combinations of source and destination color imaging devices; generating device links based on the error reduction, each of the device links defining a transformation of color values for one of the combinations of source and destination color imaging devices; and applying, for a selected combination of source and destination color imaging devices, a corresponding device link to transform color values for the selected combination.
Claim 56
Dependent Claim
108 words
A data storage medium storing a computer program that, when executed: applies forward transformation profiles to transform device-dependent color values to device-independent color values for various source and destination color imaging devices; reduces error between the source and destination device-independent color values for selected combinations of source and destination color imaging devices; generates device links based on the error reduction, each of the device links defining a transformation of color values for one of the combinations of source and destination color imaging devices; and applies, for a selected combination of source and destination color imaging devices, a corresponding device link to transform color values for the selected combination.
Claim 57
Dependent Claim
108 words
A data storage medium storing a computer program that, when executed: applies forward transformation profiles to transform device-dependent color values to device-independent color values for various source and destination color imaging devices; reduces error between the source and destination device-independent color values for selected combinations of source and destination color imaging devices; generates device links based on the error reduction, each of the device links defining a transformation of color values for one of the combinations of source and destination color imaging devices; and applies, for a selected combination of source and destination color imaging devices, a corresponding device link to transform color values for the selected combination.
Claim 58
Dependent Claim
85 words
A data storage medium storing computer program code that defines device links generated by applying forward transformation profiles to transform device-dependent color values to device-independent color values for various source and destination color imaging devices, and reducing error between the source and destination device-independent color values for selected combinations of source and destination color imaging devices, wherein each of the device links defines a transformation of color values based on the error reduction for one of the combinations of source and destination color imaging devices.
Claim 59
Dependent Claim
85 words
A data storage medium storing computer program code that defines device links generated by applying forward transformation profiles to transform device-dependent color values to device-independent color values for various source and destination color imaging devices, and reducing error between the source and destination device-independent color values for selected combinations of source and destination color imaging devices, wherein each of the device links defines a transformation of color values based on the error reduction for one of the combinations of source and destination color imaging devices.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-07-11 | 2004-01-10 | 2004-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-07-11 | 2008-01-10 | 2008-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-07-11 | 2012-01-10 | 2012-07-11 | $7700.00 | Window Closed / Lapsed |