US4464464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color photographic recording material
Assignee: Agfa Gevaert AG
•
Filing: 1982-07-26
•
Granted: 1984-08-07
•
Expires: 2002-07-26
Abstract
Abstract The color yield and color granularity of color photographic recording materials is improved by using compounds of the general formula I as the sole or as additional oil formers in coupler-containing internal layers. The effect is particularly clear in layers having the small amount of gelatine. ##STR1## wherein: R 1 is an aliphatic group having at least 8 carbon atoms, R 2 is hydrogen or alkyl, R 3 is a heterocyclic group or --(X) n --R 4 , R 4 is aryl, X is --O--, --NH--, --NCH 3 --, or --CH═CH--, m is 0, 1 or 2, and n is 0 or 1.
Inventors
- 👤 Reinhart Matejec
- 👤 Fritz Nittel
- 👤 Johannes Sobel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:29
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/388; G03C7/3885
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
145 words
A color photographic recording material of increased color yield and reduced color granularity comprising at least one silver halide emulsion layer, a color coupler for chromogenic development associated with said silver halide layer, and at least one internal layer comprising one or more hydrophobic color couplers and an oil former compound with the proviso that all color couplers in said internal layer are hydrophobic, said oil former compound being of the following general formula ##STR27## wherein R 1 represents aliphatic group having at least 8 carbon atoms, R 2 represents hydrogen or alkyl, R 3 represents a heterocyclic group linked via a ring C-atom or via a ring N-atom, or a group of the formula --(X) n --R 4 , R 4 represents aryl, X represents --O--, --NH--, --NCH 3 -- or --CH═CH--, m represents 0, 1 or 2 and n represents 0 or 1.
Claim 2
Dependent Claim
145 words
A color photographic recording material of increased color yield and reduced color granularity comprising at least one silver halide emulsion layer, a color coupler for chromogenic development associated with said silver halide layer, and at least one internal layer comprising one or more hydrophobic color couplers and an oil former compound with the proviso that all color couplers in said internal layer are hydrophobic, said oil former compound being of the following general formula ##STR27## wherein R 1 represents aliphatic group having at least 8 carbon atoms, R 2 represents hydrogen or alkyl, R 3 represents a heterocyclic group linked via a ring C-atom or via a ring N-atom, or a group of the formula --(X) n --R 4 , R 4 represents aryl, X represents --O--, --NH--, --NCH 3 -- or --CH═CH--, m represents 0, 1 or 2 and n represents 0 or 1.
Claim 3
Dependent Claim
25 words
A recording material as claimed in claim 1 wherein the binder layer additionally contains at least one (other) oil former for the hydrophobic color coupler.
Claim 4
Dependent Claim
21 words
A recording material as claimed in claim 2, wherein the other oil former does not correspond to the general formula I.
Claim 5
Dependent Claim
47 words
A recording material as claimed in claim 1 wherein the compound of the general formula I is contained in a silver halide emulsion layer which contains less than 0.6 g of gelatine, based on the quantity of silver halide corresponding to 1 g of AgNO 3 .
Claim 6
Dependent Claim
44 words
A recording material as claimed in claim 1 wherein the compound of the general formula I is contained in a binder layer free from silver halide which contains less than 0.8 g of gelatine, based on 1 g of the color coupler contained therein.
References Cited (Backward Citations)
US3689271A
Cited
US3764336A
Cited
US3765897A
Cited
US3779765A
Cited
US3912517A
Cited
US3920456A
Cited
US3948663A
Cited
US4297438A
Cited
US4368259A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-07 | 1988-02-06 | 1988-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-07 | 1992-02-06 | 1992-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-07 | 1996-02-06 | 1996-08-07 | $7700.00 | Window Closed / Lapsed |