US4308328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
UV-Stabilized photographic elements
Assignee: Solutia Inc
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Filing: 1980-06-18
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Granted: 1981-12-29
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Expires: 2000-06-18
Abstract
Abstract Inclusion of a stabilizer selected from phenyl and naphthyl esters of benzene and naphthalene carboxylic acids and mixtures thereof in an article, e.g. a photographic element, comprising an organic dye or precursor thereof increases stability of the dye against ultraviolet radiation. Particularly good results are achieved when the stabilizer is dispersed in a polymer of relatively high solubility parameter and low crystallinity.
Inventors
- 👤 Ival O. Salyer
- 👤 Arthur M. Usmani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:44
CPC Classifications
G; G03; G03C; G03C11/00; G03C11/08; G03C11/10; G03C1/00; G03C1/76; G03C1/815; G03C1/8155
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
46 words
A photographic element comprising a photographic organic dye image or precursor thereof and a stabilizer selected from phenyl and naphthyl diesters of benzene and naphthalene dicarboxylic acids and mixtures thereof in amount and concentration sufficient to substantially increase the stability of said dye against ultraviolet radiation.
Claim 2
Dependent Claim
46 words
A photographic element comprising a photographic organic dye image or precursor thereof and a stabilizer selected from phenyl and naphthyl diesters of benzene and naphthalene dicarboxylic acids and mixtures thereof in amount and concentration sufficient to substantially increase the stability of said dye against ultraviolet radiation.
Claim 3
Dependent Claim
25 words
A photographic element of claim 1 wherein said esters are di(alkylphenyl) isophthalates and terephthalates in which said alkyl has up to about 24 carbon atoms.
Claim 4
Dependent Claim
31 words
A photographic element of claim 2 wherein said stabilizer is dispersed in a film-forming polymer having a solubility parameter of at least about 9 and crystallinity not greater than about 25%.
Claim 5
Dependent Claim
17 words
A photographic element of claim 3 wherein said alkyl has from about 4 to 16 carbon atoms.
Claim 6
Dependent Claim
21 words
A photographic element of claim 4 wherein said polymer is selected from cellulose esters, cellulose ethers, proteins, polymethacrylates and mixtures thereof.
Claim 7
Dependent Claim
18 words
A photographic element of claim 5 wherein said alkyl has from about 8 to about 10 carbon atoms.
Claim 8
Dependent Claim
13 words
A photographic element of claim 6 wherein said polymer is predominantly cellulose ester.
Claim 9
Dependent Claim
13 words
A photographic element of claim 1 wherein said dye is an azo dye.
Claim 10
Dependent Claim
24 words
A photographic element of claim 1 wherein said dye is a monoazo dye derived from an enolic coupler selected from phenols, naphthols and pyrazolones.
Claim 11
Dependent Claim
27 words
A photographic element of claim 9 wherein said esters are di(alkylphenyl) isophthalates and terephthalates in which said alkyl has from about 4 to about 16 carbon atoms.
Claim 12
Dependent Claim
15 words
A photographic element of claim 1 wherein said dye is selected from arylazo-1-naphthols and arylazo-5-pyrazolones.
Claim 13
Independent Claim
51 words
A method which comprises incorporating in a photographic element containing a photographic organic dye image or precursor thereof a stabilizer selected from phenyl and naphthyl diesters of benzene and naphthalene dicarboxylic acids and mixtures thereof in amount and concentration sufficient to substantially increase the stability of said dye against ultraviolet radiation.
Claim 14
Independent Claim
51 words
A method which comprises incorporating in a photographic element containing a photographic organic dye image or precursor thereof a stabilizer selected from phenyl and naphthyl diesters of benzene and naphthalene dicarboxylic acids and mixtures thereof in amount and concentration sufficient to substantially increase the stability of said dye against ultraviolet radiation.
Claim 15
Dependent Claim
26 words
A method of claim 12 wherein said esters are di(alkylphenyl) isophthalates and terephthalates in which said alkyl has from about 4 to about 16 carbon atoms.
Claim 16
Dependent Claim
12 words
A method of claim 13 wherein said dye is an azo dye.
Claim 17
Dependent Claim
40 words
A method of claim 13 wherein said stabilizer is dispersed in a film-forming polymer having a solubility parameter of at least about 9 and crystallinity not greater than about 25%, and the resulting stabilizer-containing polymer is incorporated in said element.
Claim 18
Dependent Claim
51 words
A photographic color print comprising a photographic organic dye image and a stabilizer selected from di(alkylphenyl) isophthalates and terephthalates and mixtures thereof in which said alkyl has from about 4 to about 16 carbon atoms in amount and concentration sufficient to substantially increase the stability of said dye against ultraviolet radiation.
Claim 19
Dependent Claim
51 words
A photographic color print comprising a photographic organic dye image and a stabilizer selected from di(alkylphenyl) isophthalates and terephthalates and mixtures thereof in which said alkyl has from about 4 to about 16 carbon atoms in amount and concentration sufficient to substantially increase the stability of said dye against ultraviolet radiation.
Claim 20
Dependent Claim
32 words
A photographic color print of claim 16 wherein said stabilizer is dispersed in a film-forming polymer having a solubility parameter of at least about 9 and crystallinity not greater than about 25%.
Claim 21
Dependent Claim
34 words
A photographic color print of claim 16 having a coating containing said stabilizer dispersed in a film-forming polymer having a solubility parameter of at least about 9 and crystallinity not greater than about 25%.
Claim 22
Dependent Claim
19 words
A photographic color print of claim 18 wherein said polymer is selected from cellulose esters, polymethacrylates and mixtures thereof.
Claim 23
Dependent Claim
19 words
A photographic color print of claim 18 wherein said dye or precursor thereof is not contained in said coating.
Claim 24
Dependent Claim
14 words
A photographic color print of claim 20 wherein said dye is an azo dye.
Claim 25
Dependent Claim
17 words
A photographic color print of claim 20 wherein said coating is an external coating on said print.
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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) | 1984-12-28 | 1985-06-29 | 1985-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-28 | 1989-06-29 | 1989-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-28 | 1993-06-29 | 1993-12-29 | $7700.00 | Window Closed / Lapsed |