US4420555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic materials containing yellow filter dyes
Assignee: Eastman Kodak Co
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Filing: 1982-07-19
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Granted: 1983-12-13
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Expires: 2002-07-19
Abstract
Abstract Light sensitive layers in photographic elements are protected against exposure to radiation in the blue region of the visible spectrum by a yellow filter dye having the structure: ##STR1## where: R 1 is alkyl of 1 to 3 carbon atoms; R 2 is hydrogen or alkyl of 1 to 3 carbon atoms; R 3 and R 4 are each individually alkyl of 1 to 3 carbon atoms, at least one of which is terminated with ##STR2## and R 5 is alkyl of 1 to 3 carbon atoms or fluoroalkyl of 1 to 3 carbon atoms.
Inventors
- 👤 Spencer M. Krueger
- 👤 James W. Brown, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:38
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/83; C; C09; C09B; C09B23/00; C09B23/14; C09B23/143
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
125 words
In a photographic element comprising a support, a silver halide emulsion layer sensitive to a region of the visible spectrum in addition to the blue region, and a yellow filter layer between the silver halide emulsion layer and the intended source of exposure, the improvement wherein the yellow filter layer comprises a yellow dye represented by the structural formula: ##STR49## where: R 1 is alkyl of 1 to 3 carbon atoms; R 2 is hydrogen or alkyl of 1 to 3 carbon atoms; R 3 and R 4 each individually alkyl of 1 to 3 carbon atoms, at least one of which is terminated with ##STR50## and R 5 is alkyl of 1 to 3 carbon atoms or fluoroalkyl of 1 to 3 carbon atoms.
Claim 2
Dependent Claim
125 words
In a photographic element comprising a support, a silver halide emulsion layer sensitive to a region of the visible spectrum in addition to the blue region, and a yellow filter layer between the silver halide emulsion layer and the intended source of exposure, the improvement wherein the yellow filter layer comprises a yellow dye represented by the structural formula: ##STR49## where: R 1 is alkyl of 1 to 3 carbon atoms; R 2 is hydrogen or alkyl of 1 to 3 carbon atoms; R 3 and R 4 each individually alkyl of 1 to 3 carbon atoms, at least one of which is terminated with ##STR50## and R 5 is alkyl of 1 to 3 carbon atoms or fluoroalkyl of 1 to 3 carbon atoms.
Claim 3
Dependent Claim
59 words
A photographic element of claim 1 wherein: R 1 and R 2 are each individually alkyl of 1 to 3 carbon atoms; R 3 and R 4 are each individually alkyl of 1 to 3 carbon atoms, at least one of which is terminated with ##STR51## and R 5 is alkyl or fluoroalkyl of 1 to 3 carbon atoms.
Claim 4
Dependent Claim
18 words
A photographic element of claim 1 or 2 wherein the yellow filter layer further comprises a polymeric latex.
Claim 5
Dependent Claim
65 words
A photographic element of claim 3 wherein the polymeric latex comprises a polymer having the following repeating units: (a) 40 to 98 weight percent repeating units derived from one or more esters of a 2-alkenoic acid monomer; (b) 2 to 25 weight percent repeating units derived from a hydrophilic ethenic monomer; and (c) 0 to 58 weight percent repeating units derived from a hardenable monomer.
Claim 6
Dependent Claim
110 words
In a photographic element comprising a support bearing red-sensitive and green-sensitive silver halide emulsion layers, a yellow filter layer and a blue sensitive silver halide emulsion layer, the improvement wherein the yellow filter layer comprises a yellow dye represented by the structural formula: ##STR52## where: R 1 is alkyl of 1 to 3 carbon atoms; R 2 is hydrogen or alkyl of 1 to 3 carbon atoms; R 3 and R 4 are each individually alkyl of 1 to 3 carbon atoms, at least one of which is terminated with ##STR53## and R 5 is alkyl of 1 to 3 carbon atoms or fluoroalkyl of 1 to 3 carbon atoms.
Claim 7
Dependent Claim
110 words
In a photographic element comprising a support bearing red-sensitive and green-sensitive silver halide emulsion layers, a yellow filter layer and a blue sensitive silver halide emulsion layer, the improvement wherein the yellow filter layer comprises a yellow dye represented by the structural formula: ##STR52## where: R 1 is alkyl of 1 to 3 carbon atoms; R 2 is hydrogen or alkyl of 1 to 3 carbon atoms; R 3 and R 4 are each individually alkyl of 1 to 3 carbon atoms, at least one of which is terminated with ##STR53## and R 5 is alkyl of 1 to 3 carbon atoms or fluoroalkyl of 1 to 3 carbon atoms.
Claim 8
Dependent Claim
59 words
A photographic element of claim 5 wherein: R 1 and R 2 are each individually alkyl of 1 to 3 carbon atoms; R 3 and R 4 are each individually alkyl of 1 to 3 carbon atoms, at least one of which is terminated with ##STR54## and R 5 is alkyl or fluoroalkyl of 1 to 3 carbon atoms.
Claim 9
Dependent Claim
20 words
A photographic element of claim 5 wherein the yellow filter layer comprises one or more of the following dyes: ##STR55##
Claim 10
Dependent Claim
19 words
A photographic element of claim 5, 6 or 7 wherein the yellow filter layer further comprises a polymeric latex.
Claim 11
Dependent Claim
65 words
A photographic element of claim 8 wherein the polymeric latex comprises a polymer having the following repeating units: (a) 40 to 98 weight percent repeating units derived from one or more esters of a 2-alkenoic acid monomer; (b) 2 to 25 weight percent repeating units derived from a hydrophilic ethenic monomer; and (c) 0 to 58 weight percent repeating units derived from a hardenable monomer.
Claim 12
Dependent Claim
33 words
A photographic element of claim 8 wherein the polymeric latex comprises a polymer selected from poly(methyl acrylate-co-tetrahydrofurfuryl methacrylate-co-2-acrylamido-2-methylpropane sulfonic acid), poly(methyl acrylate-co-2-acrylamido-2-methylpropane sulfonic acid-co-2-acetoacetoxyethyl methacrylate); poly(methylacrylate-co-2-acrylamido-2-methylpropane sulfonic acid) and alkali metal salts thereof.
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) | 1986-12-12 | 1987-06-13 | 1987-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-12 | 1991-06-13 | 1991-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-12 | 1995-06-13 | 1995-12-13 | $7700.00 | Window Closed / Lapsed |