US3859095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color-photographic material with improved color reproduction
Assignee: Agfa Gevaert AG
•
Filing: 1973-02-26
•
Granted: 1975-01-07
•
Expires: 1993-02-26
Abstract
Abstract In a color photographic multiplelayer material having diffusionfast dyes and containing colorless color-forming couplers and colored masking couplers in at least one layer and which remain in the layer and contribute to the production of the same partial color image, the couplers differing in their coupling reactivity wherein good masking is achieved, by providing the more reactive colorless coupler in contrast to the less reactive colored coupler, dispersed in the particular layer in the form of small particles or droplet of a water-insoluble organic crystalloid solvent with a boiling point above 175*C. The couplers contain an alkyl radical attached to the coupler molecule in an non-coupling position.
Inventors
- 👤 Bernhard Morcher
- 👤 Helmut Mader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:09
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/3225; G03C7/333; G03C7/3335
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
167 words
A COLOR PHOTOGRAPHIC MULTIPLE-LAYER MATERIAL CONTAINING COLORFORMING COUPLERS AND COMPRISING AT LEAST ONE REDSENSITIZED, ONE GREEN-SENSITIZED AND ONE BLUE-SENSITIVE SILVER HALIDE EMULSION LAYER AND DISPERSED IN AT LEAST ONE OF THE FIRST TWO LAYERS A LESS REACTIVE COLORED MASKING COUPLER AND A MORE REACTIVE COLORLESS COUPLER, WHEREIN THE IMPROVEMENT COMPRISES (1) AT LEAST ONE OF THE FIRST TWO LAYERS CONSISTING PARTLY OF AN OIL FORMER HAVING A BOILING POINT OF AT LEAST 175*C DISTRIB BUTED IN SAID LAYER AND CONTAINING THE MORE REACTIVE COLORLESS COUPLER DISSOLVED IN THE OIL FORMER, AND (2) THE LESS REACTIVE COLORED MASKING COUPLER IS CONTAINED IN THE NON-OIL FORMER PART OF SAID LAYER, BOTH COUPLERS CONTAINING AT LEAST ONE LONG ALKYL RADICAL WITH 6-22 CARBON ATOMS IN A NON-COUPLING POSITION ON THE COUPLER, SAID GROUP MAKING SAID COUPLERS NONDIFFUSIBLE TO PRODUCE UPON COLOR DEVELOPMENT DYES OF SUBSTANTIALLY THE SAME COLOR THAT REMAIN IN THE LAYER AND CONTRIBUTE TO THE SAME PARTIAL IMAGE, THE COLORED COUPLER BEING SELECTED FROM THE GROUP CONSISTING OF
Claim 2
Dependent Claim
167 words
A COLOR PHOTOGRAPHIC MULTIPLE-LAYER MATERIAL CONTAINING COLORFORMING COUPLERS AND COMPRISING AT LEAST ONE REDSENSITIZED, ONE GREEN-SENSITIZED AND ONE BLUE-SENSITIVE SILVER HALIDE EMULSION LAYER AND DISPERSED IN AT LEAST ONE OF THE FIRST TWO LAYERS A LESS REACTIVE COLORED MASKING COUPLER AND A MORE REACTIVE COLORLESS COUPLER, WHEREIN THE IMPROVEMENT COMPRISES (1) AT LEAST ONE OF THE FIRST TWO LAYERS CONSISTING PARTLY OF AN OIL FORMER HAVING A BOILING POINT OF AT LEAST 175*C DISTRIB BUTED IN SAID LAYER AND CONTAINING THE MORE REACTIVE COLORLESS COUPLER DISSOLVED IN THE OIL FORMER, AND (2) THE LESS REACTIVE COLORED MASKING COUPLER IS CONTAINED IN THE NON-OIL FORMER PART OF SAID LAYER, BOTH COUPLERS CONTAINING AT LEAST ONE LONG ALKYL RADICAL WITH 6-22 CARBON ATOMS IN A NON-COUPLING POSITION ON THE COUPLER, SAID GROUP MAKING SAID COUPLERS NONDIFFUSIBLE TO PRODUCE UPON COLOR DEVELOPMENT DYES OF SUBSTANTIALLY THE SAME COLOR THAT REMAIN IN THE LAYER AND CONTRIBUTE TO THE SAME PARTIAL IMAGE, THE COLORED COUPLER BEING SELECTED FROM THE GROUP CONSISTING OF
Claim 3
Dependent Claim
29 words
In the color photographic multiple-layer material as claimed in claim 1 the oil former selected from the group consisting of phosphoric acid triaryl ester and phthalic acid dialkyl esters.
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) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |