Patent US5723263A successfully refreshed from Google Patents.
US5723263A
Expired / Lapsed
US
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Color negative element having improved blue record printer compatibility
Assignee: Eastman Kodak Co
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Filing: 1996-11-12
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Granted: 1998-03-03
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Expires: 2016-11-12
Abstract
Abstract A multicolor negative photographic element comprises a support bearing a blue light-sensitive silver halide emulsion first layer and a green light-sensitized silver halide emulsion second layer wherein said second layer contains a dye sensitized to green light and wherein said first layer has associated therewith a hue correction coupler which upon coupling with oxidized developer produces a dye having a maximum absorbance in the range of 460 to 510 nm. so that the element has a D480/D440 density ratio which is greater than that exhibited by the element without the hue correction coupler. The invention also encompasses a blue sensitive silver halide emulsion layer associated with the hue correction coupler and a method of forming an image in the photographic element of the invention.
Inventors
- 👤 Stephen Paul Singer
- 👤 Paul Barrett Merkel
- 👤 Jeffrey Walter Schmoeger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:36
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/36; G03C7/3003; G03C7/3041; G03C7/305; G03C7/30511; G03C7/30517; G03C7/30535; G03C7/3029; G03C2007/3034
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
171 words
A process for forming a positive image on a negative working color photographic paper using the negative-positive photographic system, comprising: forming a color negative image by exposing a color negative film element to the image, said element comprising a support bearing a blue light-sensitive silver halide emulsion first layer and a green light-sensitized silver halide emulsion second layer wherein said second layer contains a green sensitizing dye and wherein said first layer has associated therewith a hue correction coupler which upon coupling with oxidized developer produces a dye having a maximum absorbance in the range of 460 to 510 nm. and having a D480/D440 density ratio at mid scale which is greater than that exhibited by the element without the hue correction coupler; and then forming a positive color image reflective print by projecting said color negative image onto a negative-working color paper having a maximum blue sensitivity in the range of 470-480 nm using a printer that employs blue filters having a maximum sensitivity in the range of 440-445 nm.
Claim 2
Dependent Claim
171 words
A process for forming a positive image on a negative working color photographic paper using the negative-positive photographic system, comprising: forming a color negative image by exposing a color negative film element to the image, said element comprising a support bearing a blue light-sensitive silver halide emulsion first layer and a green light-sensitized silver halide emulsion second layer wherein said second layer contains a green sensitizing dye and wherein said first layer has associated therewith a hue correction coupler which upon coupling with oxidized developer produces a dye having a maximum absorbance in the range of 460 to 510 nm. and having a D480/D440 density ratio at mid scale which is greater than that exhibited by the element without the hue correction coupler; and then forming a positive color image reflective print by projecting said color negative image onto a negative-working color paper having a maximum blue sensitivity in the range of 470-480 nm using a printer that employs blue filters having a maximum sensitivity in the range of 440-445 nm.
Claim 3
Dependent Claim
41 words
The process of claim 1 wherein the coated level of said hue correction coupler is such that the element has a D480/D440 density ratio which is at least 0.06 greater than that exhibited by the element without the hue correction coupler.
Claim 4
Dependent Claim
25 words
The process of claim 2 wherein said density ratio is at least 0.10 greater than that exhibited by the element without the hue correction coupler.
Claim 5
Dependent Claim
25 words
The process of claim 3 wherein said density ratio is at least 0.15 greater than that exhibited by the element without the hue correction coupler.
Claim 6
Dependent Claim
28 words
The process of claim 1 wherein said photographic element contains at least two emulsion layers sensitive to blue light, said layers being respectively more and less light sensitive.
Claim 7
Dependent Claim
23 words
The process of claim 5 wherein the hue correction coupler is contained in the blue light sensitive layer which is less light sensitive.
Claim 8
Dependent Claim
24 words
The process of claim 1 wherein the hue correction coupler is represented by one of the formulas selected from the group consisting of: ##STR7##
Claim 9
Dependent Claim
47 words
The process of claim 1 where the increase of D550/D440 of the element at neutral midscale exposure, which is caused by the addition of the hue correction coupler, is less than the amount that the addition of the hue correction coupler increases D480/D440 at neutral midscale exposure.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-03-02 | 2001-09-01 | 2002-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-03-02 | 2005-09-01 | 2006-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-03-02 | 2009-09-01 | 2010-03-03 | $7700.00 | Window Closed / Lapsed |