US3079257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic materials containing acrylonitrile copolymers as matting agents
Assignee: Agfa Gevaert NV
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Filing: 1958-08-26
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Granted: 1963-02-26
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Expires: 1978-08-26
Abstract
No abstract record available.
Inventors
- 👤 Morcher Bernhard
- 👤 Kolb Gunter
- 👤 Dennstedt Ingofroh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:58
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/42; C08F20/44; C08F2/00; C08F2/12; C08F2/16; Y; Y10; Y10S; Y10S430/00; Y10S430/151
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
182 words
A LIGHT-SENSITIVE PHOTOGRAPHIC MATERIAL HAVING A MAT FINISH, WHICH COMPRISES A SUPPORT BEARING AT LEAST ONE LAYER OF A SILVER HALIDE EMULSION AND BEARING AT LEAST ONE PROTECTIVE LAYER SUPERIMPOSED OVER ONE OF THE SAID EMULSION LAYERS, AT LEAST ONE OF THE TWO SAID LAYERS HAVING INTIMATELY DISTRIBUTED THERETHROUGH AN AMOUNT, BASED ON THE TOTAL WEIGHT OF THE BINDER CONTENT OF THE SAID LAYER, BETWEEN ABOUT 10 AND ABOUT 50 PERCENT BY WEIGHT OF DISCRETE SMALL PARTICLES OF A COPOLYMER OF ACRYLONITRILE AND A POLYMERIZABLE COMPOUND OF THE GROUP CONSISTING OF METHACRYLIC ESTERS OF LOWER ALKANOLS, VINYL ESTERS OF LOWER ALIPHATIC ORGANIC ACIDS, AND MIXTURES THEREOF WITH POLYMERIZABLE NONCONJUGATED POLYOLEFINS, THE ACRYLONITRILE CONTENT OF THE COPOLYMER BEING AT LEAST 60 PERCENT OF THE TOTAL WEIGHT OF THE COPOLYMER, THE PARTICLES OF THE SAID COPOLYMER HAVING DIAMETERS BETWEEN 0.1 AND 5.0 MICRONS, AND THE SAID COPOLYMER PARTICLES HAVING BEEN PRODUCED BY COPOLYMERIZATION IN AN AQUEOUS MEDIUM IN THE PRESENCE OF A FREE-RADICAL-FORMING CATALYST AND A PROTECTIVE COLLOID THAT IS FREE OF EMULSIFIERS HAVING A STRONGLY HYDROPHILIC GROUP ATTACHED TO A LONG CARBON CHAIN.
Claim 2
Dependent Claim
182 words
A LIGHT-SENSITIVE PHOTOGRAPHIC MATERIAL HAVING A MAT FINISH, WHICH COMPRISES A SUPPORT BEARING AT LEAST ONE LAYER OF A SILVER HALIDE EMULSION AND BEARING AT LEAST ONE PROTECTIVE LAYER SUPERIMPOSED OVER ONE OF THE SAID EMULSION LAYERS, AT LEAST ONE OF THE TWO SAID LAYERS HAVING INTIMATELY DISTRIBUTED THERETHROUGH AN AMOUNT, BASED ON THE TOTAL WEIGHT OF THE BINDER CONTENT OF THE SAID LAYER, BETWEEN ABOUT 10 AND ABOUT 50 PERCENT BY WEIGHT OF DISCRETE SMALL PARTICLES OF A COPOLYMER OF ACRYLONITRILE AND A POLYMERIZABLE COMPOUND OF THE GROUP CONSISTING OF METHACRYLIC ESTERS OF LOWER ALKANOLS, VINYL ESTERS OF LOWER ALIPHATIC ORGANIC ACIDS, AND MIXTURES THEREOF WITH POLYMERIZABLE NONCONJUGATED POLYOLEFINS, THE ACRYLONITRILE CONTENT OF THE COPOLYMER BEING AT LEAST 60 PERCENT OF THE TOTAL WEIGHT OF THE COPOLYMER, THE PARTICLES OF THE SAID COPOLYMER HAVING DIAMETERS BETWEEN 0.1 AND 5.0 MICRONS, AND THE SAID COPOLYMER PARTICLES HAVING BEEN PRODUCED BY COPOLYMERIZATION IN AN AQUEOUS MEDIUM IN THE PRESENCE OF A FREE-RADICAL-FORMING CATALYST AND A PROTECTIVE COLLOID THAT IS FREE OF EMULSIFIERS HAVING A STRONGLY HYDROPHILIC GROUP ATTACHED TO A LONG CARBON CHAIN.
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) | 1966-02-25 | 1966-08-27 | 1967-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-25 | 1970-08-27 | 1971-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-25 | 1974-08-27 | 1975-02-26 | $7700.00 | Window Closed / Lapsed |