US3790379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color photographic light-sensitive elements with both colored and colorless color couplers
Assignee: Fujifilm Holdings Corp
•
Filing: 1972-03-07
•
Granted: 1974-02-05
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Expires: 1992-03-07
Abstract
Abstract A photographic element containing diffusion resisting 4-azopyrazolone and a colorless phenol or Alpha -naphthol derivative in the silver halide layer.
Inventors
- 👤 Y Oishi
- 👤 K Sano
- 👤 Y Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:18
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/333; G03C7/3335; G03C7/3225
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
17 words
The color-photographic light-sensitive element as claimed in claim 1, wherein said element additionally contains an anti-halation layer.
Claim 2
Dependent Claim
42 words
The color photographic light-sensitive element as claimed in claim 1, wherein R1 is a phenyl group, R2 is selected from the group consisting of acylamino and ureido groups and has from eight to 30 carbon atoms, and R3 is an aryl group.
Claim 3
Dependent Claim
41 words
The color photographic light-sensitive element as claimed in claim 1, wherein R6 is hydrogen, R7 is an aryl group of from eight to 30 carbon atoms, R8 is 6-chloro and R9 is a 5-alkyl group of one to five carbon atoms.
Claim 4
Dependent Claim
49 words
A process for preparing a photographic image having high blue to yellow contrast comprising imagewise exposing to light a photographic light-sensitive element comprising a support and a single silver halide emulsion layer containing color couplers, said couplers consisting essentially of: a. a diffusion resisting 4-azo-pyrazolone compound of the formula:
Claim 5
Dependent Claim
41 words
The process of claim 5, where said R1 is a phenyl group, R2 is a member selected from the group consisting of an acylamino group and ureido group having from eight to 30 carbon atoms, and R3 is an aryl group.
Claim 6
Dependent Claim
31 words
The process of claim 5, wherein said R6 is hydrogen, R7 is an aryl group, R8 is 6-chloro, and R9 is a 5-alkyl group having from one to five carbon atoms.
Claim 7
Dependent Claim
13 words
The process of claim 5, wherein said element additionally contains an anti-halation layer.
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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |