US3843370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Instant access one-layer color photography with color screen containing color couplers
Assignee: GAF Corp
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Filing: 1973-02-26
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Granted: 1974-10-22
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Expires: 1993-02-26
Abstract
Abstract COUPLING WITH THE OXIDATION PRODUCT OF A PARAPHYNYLENEDIAMINE COLOR DEVELOPER, A DYE COMPLEMENTARY IN COLOR TO THE PRIMARY COLOR OF THE OIL DROPLET. 1. A LIGHT SENSITIVE PHOTOGRAPHIC ELEMENT COMPRISING A TRANSPARENT FILM BASE CARRYING, IN THE FOLLOWING ORDER: (1) A PANCHROMATICALLY SENSITIZED SILVER HALIDE EMULSION LAYER WHICH IS IN CONTIGOUS CONTACT WITH (2) A MULTICOLOR SCREENING LAYER MADE OF RED, GREEN AND BLUE COLORED OIL DROPLETS, EACH DROPLET CONTAINING NON-DIFFUSING DYE HAVING ONE OF THE PRIMARY COLORS TOGETHER WITH A COLOR FORMER FAST TO DIFFUSION WHICH BECOMES DIFFUSING AT A PH OF AT LAST 12.5, AND IS CAPABLE OF FORMING UPON
Inventors
- 👤 B Waxman
- 👤 R Shannahan
- 👤 F Viro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 01:03
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A LIGHT SENSITIVE PHOTOGRAPHIC ELEMENT COMPRISING A TRANSPARENT FILM BASE CARRYING, IN THE FOLLOWING ORDER: (1) A PANCHROMATICALLY SENSITIZED SILVER HALIDE EMULSION LAYER WHICH IS IN CONTIGOUS CONTACT WITH (2) A MULTICOLOR SCREENING LAYER MADE OF RED, GREEN AND BLUE COLORED OIL DROPLETS, EACH DROPLET CONTAINING NON-DIFFUSING DYE HAVING ONE OF THE PRIMARY COLORS TOGETHER WITH A COLOR FORMER FAST TO DIFFUSION WHICH BECOMES DIFFUSING AT A PH OF AT LAST 12.5, AND IS CAPABLE OF FORMING UPON
Claim 2
Dependent Claim
78 words
A LIGHT SENSITIVE PHOTOGRAPHIC ELEMENT COMPRISING A TRANSPARENT FILM BASE CARRYING, IN THE FOLLOWING ORDER: (1) A PANCHROMATICALLY SENSITIZED SILVER HALIDE EMULSION LAYER WHICH IS IN CONTIGOUS CONTACT WITH (2) A MULTICOLOR SCREENING LAYER MADE OF RED, GREEN AND BLUE COLORED OIL DROPLETS, EACH DROPLET CONTAINING NON-DIFFUSING DYE HAVING ONE OF THE PRIMARY COLORS TOGETHER WITH A COLOR FORMER FAST TO DIFFUSION WHICH BECOMES DIFFUSING AT A PH OF AT LAST 12.5, AND IS CAPABLE OF FORMING UPON
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |