US6347240B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
System and method for use in displaying images of a body part
Assignee: Medtronic Navigation Inc
•
Filing: 1997-09-16
•
Granted: 2002-02-12
•
Expires: 2017-09-16
Abstract
Abstract A system for use during a medical or surgical procedure on a body. The system generates a display representing the position of two or more body elements during the procedure based on an image data set generated by a scanner prior to the procedure. The image data set has reference points for each of the body elements, the reference points of a particular body element having a fixed spatial relation to the particular body element. The system includes an apparatus for identifying, during the procedure, the relative position of each of the reference points of each of the body elements to be displayed. The system also includes a processor for modifying the image data set according to the identified relative position of each of the reference points during the procedure, as identified by the identifying apparatus, said processor generating a displaced image data set representing the position of the body elements during the procedure. The system also includes a display utilizing the displaced image data set generated by the processor, illustrating the relative position of the body elements during the procedure. Methods relating to the system are also disclosed.
Inventors
- 👤 Kevin T. Foley
- 👤 Richard D. Bucholz
- 👤 Kurt R. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:08
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/0059; A61B5/0073; A61B34/00; A61B34/20; A61B5/0062; A61B5/0064; A61B5/06; A61B5/103; A61B5/107; A61B5/1077; A61B6/00; A61B6/12; A61B6/50; A61B6/501; A61B6/52; A61B6/5211; A61B6/5229; A61B6/5235; A61B8/00; A61B8/52; A61B8/5215; A61B8/5238; A61B90/00; A61B90/10; A61B90/36; A61B17/00; A61B2017/00017; A61B2017/00022; A61B2034/2046; A61B2034/2051; A61B2034/2068; A61B2034/2072; A61B2090/363; A61B2090/364; A61B90/37; A61B2090/376; A61B2090/378; A61B90/39; A61B2090/3925; A61B2090/3929; A61B2090/3937; A61B2090/3945; A61B2090/3954; A61B2090/3983; A61B34/10; A61B6/5247; A61B90/14
Claims Analysis
Total Claims: 59
Claim 1
Independent Claim
216 words
A system for use during a procedure on a body, said system generating a display representing a position of two or more body elements during the procedure, said system comprising: a memory storing an image data set representing the position of the two or more body elements based on scans taken of the body prior to the procedure, the image data set having a plurality of data points and corresponding to a plurality of reference points for each of the body elements, the reference points of a particular body element having a known spatial relation to the data points of the particular body element; means for identifying, during the procedure, the position of the reference points of each of the body elements relative to the reference points of the other body elements; a processor modifying the spatial relation of the data points of one body element relative to the data points of another body element according to the identified relative position of the reference points during the procedure as identified by the identifying means, said processor generating a displaced image data set representing the position of the body elements during the procedure; and a display utilizing the displaced image data set generated by the processor, illustrating the relative position of the body elements during the procedure.
Claim 2
Independent Claim
216 words
A system for use during a procedure on a body, said system generating a display representing a position of two or more body elements during the procedure, said system comprising: a memory storing an image data set representing the position of the two or more body elements based on scans taken of the body prior to the procedure, the image data set having a plurality of data points and corresponding to a plurality of reference points for each of the body elements, the reference points of a particular body element having a known spatial relation to the data points of the particular body element; means for identifying, during the procedure, the position of the reference points of each of the body elements relative to the reference points of the other body elements; a processor modifying the spatial relation of the data points of one body element relative to the data points of another body element according to the identified relative position of the reference points during the procedure as identified by the identifying means, said processor generating a displaced image data set representing the position of the body elements during the procedure; and a display utilizing the displaced image data set generated by the processor, illustrating the relative position of the body elements during the procedure.
Claim 3
Dependent Claim
80 words
The system of claim 1 wherein the reference points are in relation to the body elements and further comprising: a medical or surgical instrument; means for identifying, during the procedure, the position of medical or surgical instrument relative to one or more of the body elements; and wherein the display is responsive to the medical or surgical instrument position identifying means to illustrate during the procedure the relative position of the body elements relative to the medical or surgical instrument.
Claim 4
Dependent Claim
46 words
The system of claim 2 wherein the medical or surgical instrument position identifying means determines an orientation of the medical or surgical instrument relative to the body elements and wherein the display illustrates the orientation of the medical or surgical instrument relative to the body elements.
Claim 5
Dependent Claim
45 words
The system of claim 1 wherein the identifying means comprises: a reference array having a location outside the body for providing a reference; and means for determining the position of the reference points of the body elements to be displayed relative to the reference array.
Claim 6
Dependent Claim
64 words
The system of claim 4 further comprising a registration probe in communication with the reference array and wherein the determining means determines the position of a tip of the registration probe relative to the reference array whereby the position of the reference points of the body elements can be determined by positioning the tip of the registration probe at each of the reference points.
Claim 7
Dependent Claim
39 words
The system of claim 5 wherein the reference array includes sensors and wherein the registration probe includes emitters communicating with the sensors of the reference array to indicate the position of the registration probe relative to the reference array.
Claim 8
Dependent Claim
39 words
The system of claim 5 wherein the registration probe includes sensors and wherein the reference array includes emitters communicating with the sensors of the registration probe to indicate the position of the registration probe relative to the reference array.
Claim 9
Dependent Claim
110 words
The system of claim 4 further comprising a reference frame having a position in known relation to one of the body elements, said reference frame in communication with the reference array, and further comprising means for determining the position of the reference frame relative to the reference array whereby the body may be moved during the procedure while the body elements remain in fixed relation to each other and in known relation to the reference frame so that the system can determine the position of each of the body elements after movement without again identifying the relative position of each of the reference points of each of the body elements.
Claim 10
Dependent Claim
51 words
The system of claim 8 wherein the reference array includes sensors and wherein the reference frame is adapted to be attached to one of the body elements and includes emitters communicating with the sensors of the reference array to indicate the position of the reference frame relative to the reference array.
Claim 11
Dependent Claim
51 words
The system of claim 8 wherein the reference frame includes sensors and wherein the reference array is adapted to be attached to one of the body elements and includes emitters communicating with the sensors of the reference frame to indicate the position of the reference frame relative to the reference array.
Claim 12
Dependent Claim
62 words
The system of claim 4 further comprising a fluoroscopic device for determining a position of a projection of each of the body elements during the procedure and wherein the processor compares the position of the projection of the each of the body elements during the procedure to the position of the projection of each of the body elements prior to the procedure.
Claim 13
Dependent Claim
78 words
The system of claim 11 wherein the fluoroscopic device comprises a fluoroscopic tube in fixed relation to a fluoroscopic plate between which the body elements are located for determining a position of a projection of each of the body elements during the procedure and wherein the processor compares the position of the projection of each of the body elements during the procedure to the position of the projection of each of the body elements prior to the procedure.
Claim 14
Dependent Claim
59 words
The system of claim 12 further comprising a reference array and wherein said fluoroscopic tube or said fluoroscopic plate have emitters thereon in communication with the reference array and wherein the determining means determines the position of the tube or plate relative to the reference array whereby the position of the projection of each body element can be determined.
Claim 15
Dependent Claim
53 words
The system of claim 12 comprising a reference array having emitters thereon in communication with the fluoroscopic tube or the fluoroscopic plate and wherein the determining means determines the position of the tube or plate relative to the reference array whereby the position of the projection of each body element can be determined.
Claim 16
Dependent Claim
90 words
The system of claim 11 wherein the fluoroscopic device determines a position of a projection of each of the body elements during the procedure, and the processor compares the position of the projection of the each of the body elements during the procedure as determined by the fluoroscopic device to the position of the projection of each of the body elements prior to the procedure as represented by the image data set whereby the projection of the body elements may be determined without the need for exposing the body elements.
Claim 17
Dependent Claim
48 words
The system of claim 15 wherein the reference array has emitters thereon in communication with the fluoroscopic device and wherein the determining means determines the position of the fluoroscopic device relative to the reference array whereby the position of the projection of each body element can be determined.
Claim 18
Dependent Claim
30 words
The system of claim 1 further comprising means for discriminating the body elements of the image data set by creating an image data subset defining each of the body elements.
Claim 19
Dependent Claim
48 words
The system of claim 17 wherein the processor translates each of the image data subsets from the position of the body elements prior to the procedure to the position of the body elements during the procedure whereby the displaced data set consists of the translated image data subsets.
Claim 20
Dependent Claim
75 words
The system of claim 17 wherein the identifying means comprises a device for determining a position of a contour of each of the body elements during the procedure and wherein the processor compares the position of the contour of each of the body elements during the procedure as determined by the device to the position of the contour of each of the body elements prior to the procedure as represented by the image data subset.
Claim 21
Dependent Claim
94 words
The system of claim 19 wherein the device comprises an ultrasound probe for determining a position of a contour of each of the body elements during the procedure and wherein the processor compares the position of the contour of the each of the body elements during the procedure as determined by the device to the position of the contour of each of the body elements prior to the procedure as represented by the image data subset whereby the contour of the body elements may be determined without the need for exposing the body elements.
Claim 22
Dependent Claim
54 words
The system of claim 20 further comprising a reference array and wherein said ultrasound probe has emitters thereon in communication with the reference array and wherein the determining means determines the position of the ultrasound probe relative to the reference array whereby the position of the contour of each body element can be determined.
Claim 23
Dependent Claim
48 words
The system of claim 20 comprising a reference array having emitters thereon in communication with the ultrasound probe and wherein the determining means determines the position of the ultrasound probe relative to the reference array whereby the position of the contour of each body element can be determined.
Claim 24
Dependent Claim
75 words
The system of claim 19 wherein the device comprises a scanner for determining a position of a contour of each of the body elements during the procedure and wherein the processor compares the position of the contour of the each of the body elements during the procedure as determined by the device to the position of the contour of each of the body elements prior to the procedure as represented by the image data subset.
Claim 25
Dependent Claim
52 words
The system of claim 23 further comprising a reference array and wherein said scanner has emitters thereon in communication with the reference array and wherein the determining means determines the position of the scanner relative to the reference array whereby the position of the contour of each body element can be determined.
Claim 26
Dependent Claim
46 words
The system of claim 23 comprising a reference array having emitters thereon in communication with the scanner and wherein the determining means determines the position of the scanner relative to the reference array whereby the position of the contour of each body element can be determined.
Claim 27
Independent Claim
204 words
A system for use during a procedure on a body, said system generating a display representing a geometrical relationship of two or more body elements during the procedure, said system comprising: a memory for storing an image data set representing the position of the two or more body elements based on scans taken of the body prior to the procedure, the image data set having a pre-procedural geometrical spatial relationship of the body elements and having a plurality of reference points on each of the body elements, the reference points of a particular body element having a known spatial relation on the particular body element; means for identifying, during the procedure, a position of each of the reference points of the body elements to be displayed; a processor modifying the pre-procedural geometrical relationship of the body elements as necessary according to the identified position of each of the reference points as identified by the identifying means, said processor generating a displaced image data set from the modified pre-procedural geometrical relationship of the body elements, said displaced image data set representing the geometrical relationship of the body elements during the procedure; and a display system utilizing the displaced image data set to generate the display.
Claim 28
Independent Claim
204 words
A system for use during a procedure on a body, said system generating a display representing a geometrical relationship of two or more body elements during the procedure, said system comprising: a memory for storing an image data set representing the position of the two or more body elements based on scans taken of the body prior to the procedure, the image data set having a pre-procedural geometrical spatial relationship of the body elements and having a plurality of reference points on each of the body elements, the reference points of a particular body element having a known spatial relation on the particular body element; means for identifying, during the procedure, a position of each of the reference points of the body elements to be displayed; a processor modifying the pre-procedural geometrical relationship of the body elements as necessary according to the identified position of each of the reference points as identified by the identifying means, said processor generating a displaced image data set from the modified pre-procedural geometrical relationship of the body elements, said displaced image data set representing the geometrical relationship of the body elements during the procedure; and a display system utilizing the displaced image data set to generate the display.
Claim 29
Independent Claim
239 words
A method for use during a procedure, said method generating a display representing a position of two or more body elements during the procedure, said method comprising the steps of: storing an image data set in a memory, the image data set representing the position of the two or more body elements based on scans taken of the body prior to the procedure; reading the image data set stored in the memory, said image data set having a plurality of data points and a plurality of reference points for each of the body elements, the data points of each body element having a spatial relation to the data points of another body element, the reference points of a particular body element having a known spatial relation to the data points of the particular body element; identifying, during the procedure, the position of each of the reference points of each of the body elements relative to the reference points of the other body elements; modifying the spatial relation of the data points of one body element relative to the data points of another body element according to the identified relative position of the reference points during the procedure in order to generate a displaced image data set representing the relative position of the body elements during the procedure; and generating a display based on the displaced image data set illustrating the relative position of the body elements during the procedure.
Claim 30
Independent Claim
239 words
A method for use during a procedure, said method generating a display representing a position of two or more body elements during the procedure, said method comprising the steps of: storing an image data set in a memory, the image data set representing the position of the two or more body elements based on scans taken of the body prior to the procedure; reading the image data set stored in the memory, said image data set having a plurality of data points and a plurality of reference points for each of the body elements, the data points of each body element having a spatial relation to the data points of another body element, the reference points of a particular body element having a known spatial relation to the data points of the particular body element; identifying, during the procedure, the position of each of the reference points of each of the body elements relative to the reference points of the other body elements; modifying the spatial relation of the data points of one body element relative to the data points of another body element according to the identified relative position of the reference points during the procedure in order to generate a displaced image data set representing the relative position of the body elements during the procedure; and generating a display based on the displaced image data set illustrating the relative position of the body elements during the procedure.
Claim 31
Dependent Claim
83 words
The method of claim 27 further comprising the step of repositioning the body elements so that the display based on the displaced data set representing the position of the body elements during the procedure is substantially the same as the display based on the image data set generated prior to the procedure whereby the position of the body elements after repositioning is substantially the same as the position of the body elements prior to the procedure when the image data set was generated.
Claim 32
Dependent Claim
78 words
The method of claim 27 wherein the reference points are part of the body elements and further comprising the steps of: providing a medical or surgical instrument; identifying, during the procedure, the position of medical or surgical instrument relative to one or more of the body elements; and generating a display based on the position of the medical or surgical instrument illustrating the relative position of the body elements and the medical or surgical instrument during the procedure.
Claim 33
Dependent Claim
42 words
The method of claim 29 further comprising the steps of determining an orientation of the medical or surgical instrument relative to the body elements and generating a display illustrating the orientation of the medical or surgical instrument relative to the body elements.
Claim 34
Dependent Claim
44 words
The method of claim 30 further comprising the steps of: providing a reference array having a location outside the body for providing a reference; and determining the position of the reference points of the body elements to be displayed relative to the reference array.
Claim 35
Dependent Claim
46 words
The method of claim 31 further comprising the steps of providing a registration probe in communication with the reference array and determining the position of the reference points of the body elements by positioning the tip of the registration probe at each of the reference points.
Claim 36
Dependent Claim
106 words
The method of claim 31 further comprising the steps of providing a reference frame having a position in fixed relation to one of the body elements, said reference frame in communication with the reference array, and determining the position of the reference frame relative to the reference array whereby the body may be moved during the procedure while the body elements remain in fixed relation to each other and the reference frame so that the method can determine the position of each of the body elements after movement without again identifying the relative position of each of the reference points of each of the body elements.
Claim 37
Dependent Claim
31 words
The method of claim 27 further comprising the step of discriminating the body elements of the image data set by creating an image data subset defining each of the body elements.
Claim 38
Dependent Claim
49 words
The method of claim 34 further comprising the step of translating each of the image data subsets from the position of the body elements prior to the procedure to the position of the body elements during the procedure whereby the displaced data set comprises the translated image data subsets.
Claim 39
Dependent Claim
64 words
The method of claim 34 comprising the steps of determining a position of a contour of each of the body elements during the procedure and comparing the position of the contour of the each of the body elements during the procedure to the position of the contour of each of the body elements prior to the procedure as represented by the image data set.
Claim 40
Dependent Claim
89 words
The method of claim 27 comprising the steps of positioning the body elements between a fluoroscopic tube and a fluoroscope plate in fixed relation to the tube, energizing the tube to generate a projection of each of the elements on the plate, determining the relative position of the fluoroscopic projection of each of the body elements during the procedure and comparing the position represented by the fluoroscopic projection of each of the body elements during the procedure to the relative position of the body elements prior to the procedure.
Claim 41
Independent Claim
265 words
A system for use during a procedure on a body, said system generating a display representing a position of two or more body elements during the procedure, said system comprising: a memory configured to store an image data set representing the position of the two or more body elements based on scans taken of the body prior to the procedure, the image data set having a plurality of data points and corresponding to a plurality of reference points for each of the body elements, the reference points of a particular body element having a known spatial relation to the data points of the particular body element; at least three light emitters positioned with respect to the reference points on the particular body element; light sensors positioned to detect light emitted by the at least three light emitters; a digitizer positioned to receive a signal output by the light sensors, said digitizer being configured to determine a three dimensional position of the light emitters for the particular body element relative to the light emitters for the other body elements; a processor modifying the spatial relation of the data points of one body element relative to the data points of another body element according to the identified relative position of the reference points during the procedure as determined by the light emitters and the digitizer, said processor generating a displaced image data set representing the position of the body elements during the procedure; and a display utilizing the displaced image data set generated by the processor, illustrating the relative position of the body elements during the procedure.
Claim 42
Independent Claim
265 words
A system for use during a procedure on a body, said system generating a display representing a position of two or more body elements during the procedure, said system comprising: a memory configured to store an image data set representing the position of the two or more body elements based on scans taken of the body prior to the procedure, the image data set having a plurality of data points and corresponding to a plurality of reference points for each of the body elements, the reference points of a particular body element having a known spatial relation to the data points of the particular body element; at least three light emitters positioned with respect to the reference points on the particular body element; light sensors positioned to detect light emitted by the at least three light emitters; a digitizer positioned to receive a signal output by the light sensors, said digitizer being configured to determine a three dimensional position of the light emitters for the particular body element relative to the light emitters for the other body elements; a processor modifying the spatial relation of the data points of one body element relative to the data points of another body element according to the identified relative position of the reference points during the procedure as determined by the light emitters and the digitizer, said processor generating a displaced image data set representing the position of the body elements during the procedure; and a display utilizing the displaced image data set generated by the processor, illustrating the relative position of the body elements during the procedure.
Claim 43
Dependent Claim
84 words
The system of claim 38 wherein the reference points are in relation to the body elements and further comprising: a medical or surgical instrument; means for identifying, during the procedure, the position of the medical or surgical instrument relative to one or more of the body elements; and wherein the display is responsive to the medical or surgical instrument position identifying means and includes means for illustrating, during the procedure, the relative position of the body elements relative to the medical or surgical instrument.
Claim 44
Dependent Claim
46 words
The system of claim 39 wherein the medical or surgical instrument position identifying means determines an orientation of the medical or surgical instrument relative to the body elements and wherein the display illustrates the orientation of the medical or surgical instrument relative to the body elements.
Claim 45
Dependent Claim
30 words
The system of claim 38 further comprising means for discriminating the body elements of the image data set by creating an image data subset defining each of the body elements.
Claim 46
Dependent Claim
48 words
The system of claim 41 wherein the processor translates each of the image data subsets from the position of the body elements prior to the procedure to the position of the body elements during the procedure whereby the displaced data set consists of the translated image data subsets.
Claim 47
Dependent Claim
78 words
The system of claim 41 further comprising a contour position determining means for determining a position of a contour of each of the body elements during the procedure and wherein the processor compares the position of the contour of each of the body elements during the procedure as determined by the contour position determining means to the position of the contour of each of the body elements prior to the procedure as represented by the image data subset.
Claim 48
Dependent Claim
100 words
The system of claim 43 wherein the contour position determining means comprises an ultrasound probe for determining a position of a contour of each of the body elements during the procedure and wherein the processor compares the position of the contour of the each of the body elements during the procedure as determined by the contour position determining means to the position of the contour of each of the body elements prior to the procedure as represented by the image data subset whereby the contour of the body elements may be determined without the need for exposing the body elements.
Claim 49
Dependent Claim
56 words
The system of claim 44 further comprising a reference array and wherein said ultrasound probe has emitters thereon in communication with the reference array and wherein the contour position determining means determines the position of the ultrasound probe relative to the reference array whereby the position of the contour of each body element can be determined.
Claim 50
Dependent Claim
50 words
The system of claim 44 comprising a reference array having emitters thereon in communication with the ultrasound probe and wherein the contour position determining means determines the position of the ultrasound probe relative to the reference array whereby the position of the contour of each body element can be determined.
Claim 51
Dependent Claim
81 words
The system of claim 43 wherein the contour position determining means comprises a scanner for determining a position of a contour of each of the body elements during the procedure and wherein the processor compares the position of the contour of the each of the body elements during the procedure as determined by the contour position determining means to the position of the contour of each of the body elements prior to the procedure as represented by the image data subset.
Claim 52
Dependent Claim
54 words
The system of claim 47 further comprising a reference array and wherein said scanner has emitters thereon in communication with the reference array and wherein the contour position determining means determines the position of the scanner relative to the reference array whereby the position of the contour of each body element can be determined.
Claim 53
Dependent Claim
49 words
The system of claim 47 further comprising a reference array having emitters thereon in communication with the scanner and wherein the contour position determining means determines the position of the scanner relative to the reference array whereby the position of the contour of each body element can be determined.
Claim 54
Dependent Claim
62 words
The system of claim 38 further comprising a fluoroscopic device for determining a position of a projection of each of the body elements during the procedure and wherein the processor compares the position of the projection of the each of the body elements during the procedure to the position of the projection of each of the body elements prior to the procedure.
Claim 55
Dependent Claim
78 words
The system of claim 50 wherein the fluoroscopic device comprises a fluoroscopic tube in fixed relation to a fluoroscopic plate between which the body elements are located for determining a position of a projection of each of the body elements during the procedure and wherein the processor compares the position of the projection of each of the body elements during the procedure to the position of the projection of each of the body elements prior to the procedure.
Claim 56
Dependent Claim
61 words
The system of claim 51 further comprising a reference array and wherein said fluoroscopic tube or said fluoroscopic plate have emitters thereon in communication with the reference array and wherein fluoroscopic device includes means for determining the position of the tube and plate relative to the reference array whereby the position of the projection of each body element can be determined.
Claim 57
Dependent Claim
57 words
The system of claim 51 further comprising a reference array having emitters thereon in communication with the fluoroscopic tube or the fluoroscopic plate and wherein the fluoroscopic device includes means for determining the position of the tube or plate relative to the reference array whereby the position of the projection of each body element can be determined.
Claim 58
Dependent Claim
90 words
The system of claim 50 wherein the fluoroscopic device determines a position of a projection of each of the body elements during the procedure, and the processor compares the position of the projection of the each of the body elements during the procedure as determined by the fluoroscopic device to the position of the projection of each of the body elements prior to the procedure as represented by the image data set whereby the projection of the body elements may be determined without the need for exposing the body elements.
Claim 59
Dependent Claim
46 words
The system of claim 54 comprising a reference array having emitters thereon in communication with the fluoroscope and wherein the determining means determines the position of the fluoroscope relative to the reference array whereby the position of the projection of each body element can be determined.
References Cited (Backward Citations)
US3821469A
Cited
US3868565A
Cited
DE2534516A1
Cited
US4058114A
Cited
US3963028A
Cited
US3983474A
Cited
US4068156A
Cited
US4182312A
Cited
US4117337A
Cited
US4209254A
Cited
FR2417970B1
Cited
DE2852949A1
Cited
US4259725A
Cited
US4341220A
Cited
EP0018166A1
Cited
US4608977A
Cited
US4419012A
Cited
US4398540A
Cited
US4602622A
Cited
US4368556A
Cited
US4638798A
Cited
US4358856A
Cited
GB2094590A
Cited
DE3205085A1
Cited
EP0062941B1
Cited
US4465069A
Cited
US4543959A
Cited
US4407298A
Cited
US4396945A
Cited
US4473074A
Cited
DE3205915A1
Cited
US4457311A
Cited
US4506676A
Cited
US4701407A
Cited
US4961422A
Cited
US4585350A
Cited
US4651732A
Cited
US4698777A
Cited
US4701049A
Cited
US4727565A
Cited
US4660970A
Cited
US4753528A
Cited
US4841967A
Cited
US4674057A
Cited
EP0155857A3
Cited
US4571834A
Cited
US4583538A
Cited
US4649504A
Cited
US4775235A
Cited
US4701047A
Cited
US4659971A
Cited
US4705395A
Cited
US4721388A
Cited
US4821206A
Cited
US4592352A
Cited
US4706665A
Cited
US4673352A
Cited
US4721384A
Cited
USD291246S
Cited
DE3508730A1
Cited
US4782239A
Cited
US4672306A
Cited
US4737921A
Cited
US4764016A
Cited
US4743771A
Cited
EP0207452A3
Cited
US4805615A
Cited
US4955891A
Cited
US4686997A
Cited
US4705401A
Cited
US4737032A
Cited
US4803645A
Cited
US4779212A
Cited
US4709156A
Cited
US4794262A
Cited
US4771787A
Cited
US4742815A
Cited
US4722056A
Cited
US4788481A
Cited
US4776749A
Cited
US4943296A
Cited
US4821200A
Cited
US5078140A
Cited
US4822163A
Cited
US4767934A
Cited
US4723544A
Cited
US4791934A
Cited
US4733969A
Cited
US4761072A
Cited
US4933843A
Cited
US4750487A
Cited
US4764015A
Cited
US4733662A
Cited
US4837669A
Cited
US5005142A
Cited
DE8701668U1
Cited
US4825091A
Cited
US4753128A
Cited
US4745290A
Cited
US4762016A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-02-11 | 2005-08-13 | 2006-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-02-11 | 2009-08-13 | 2010-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-02-11 | 2013-08-13 | 2014-02-12 | $7700.00 | Window Closed / Lapsed |