Patent US3769020A successfully refreshed from Google Patents.
US3769020A
Expired / Lapsed
US
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Photographic material with improved properties
Assignee: Agfa Gevaert AG
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Filing: 1971-02-11
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Granted: 1973-10-30
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Expires: 1991-02-11
Abstract
Abstract A photographic material is provided having a layer support backed on both sides with polyolefine and having at least one layer of a light sensitive silver halide gelatine emulsion layer thereon. The rear surface of the support having thereon a water impermeable layer containing a major proportion of a water insoluble binder and minor proportions of an antistatic agent and an inorganic or organic matting agent.
Inventors
- 👤 W Verburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:38
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/85; G03C1/89; G03C1/775; G03C1/79; G03C1/95
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
26 words
A photograhic material according to claim 1, characterised in that it contains, as the layer support, paper which has been backed with polyethylene on both sides.
Claim 2
Dependent Claim
68 words
A photographic material according to claim 1, characterised in that the binder has the following composition: 9 to 30 percent by weight of ethylene 2 to 12 percent by weight of a half-ester of the dicarboxylic acid 90 to 58 percent by weight of a mixture of vinyl chloride and the vinyl ester, the proportion of thE latter being 15 to 45 percent by weight of this mixture.
Claim 3
Dependent Claim
17 words
A photographic material according to claim 1, wherein the matting agent is an insoluble inorganic aluminum compound.
Claim 4
Dependent Claim
17 words
A photographic material according to claim 4, wherein the matting agent is aluminum hydroxide or aluminum silicate.
Claim 5
Dependent Claim
15 words
A photographic material according to claim 1, wherein the antistatic agent is polystyrene sulphonic acid.
Claim 6
Dependent Claim
39 words
A photographic material as defined in claim 1 wherein said half-ester of an Alpha , Beta -unsaturated carboxylic acid is the cyclohexyl half-ester of maleic acid and wherein said vinyl ester of a saturated carboxylic acid is vinyl acetate.
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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |