Patent US3849140A successfully refreshed from Google Patents.
US3849140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diffusion-resistant dispersible yellow couplers for the production of photographic color images
Assignee: Agfa Gevaert AG
•
Filing: 1972-03-22
•
Granted: 1974-11-19
•
Expires: 1992-03-22
Abstract
Abstract A multiple-layer color photographic material containing silver halide as the photo-sensitive substance containing in the bluesensitive component layer a diffusion resistant dispersible color coupler for the formation of the yellow partial image of the following formula WHEREIN THE SUBSTITUENTS R1, X, R2 and n have the same definition as described hereinafter, which developed dye have favorable spectral properties.
Inventors
- 👤 K Kuffner
- 👤 H Glockner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:04
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/36; G03C7/362
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
20 words
A COLOR PHOTOGRAPHIC MATERIAL WHEN COMPRISES AT LEAST ONE SILVER HALIDE EMULSION LAYER CONTAINING A YELLOW COUPLER OF THE FORMULA
Claim 2
Dependent Claim
20 words
A COLOR PHOTOGRAPHIC MATERIAL WHEN COMPRISES AT LEAST ONE SILVER HALIDE EMULSION LAYER CONTAINING A YELLOW COUPLER OF THE FORMULA
Claim 3
Dependent Claim
16 words
A color photographic material as claimed in claim 1 wherein the yellow coupler has the formula
Claim 4
Dependent Claim
24 words
Color photographic material as claimed in claim 1 which has a plurality of emulsion layers, the yellow coupler being present in the blue-sensitive layer.
References Cited (Backward Citations)
US3409439A
Cited
US3725072A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |