Patent US2733352A successfully refreshed from Google Patents.
Patent US4287293A successfully refreshed from Google Patents.
US4287293A
Expired / Lapsed
US
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Photographic element
Assignee: Mitsubishi Paper Mills Ltd
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Filing: 1980-01-08
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Granted: 1981-09-01
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Expires: 2000-01-08
Abstract
Abstract A photographic element having a photographic layer such as silver halide emulsion layer, protective layer, intermediate layer, subcoat layer, diffusion transfer image-receiving layer, antihalation layer and backing layer, can be improved in the adhesion between the layer and support, little curling on drying, and flexibility of the layer, by incorporating into the photographic layer a conversion mixture of a polyvinyl alcohol having a saponification degree of 96% or more and an ethylene-maleic anhydride copolymer.
Inventors
- 👤 Tamotsu Iwata
- 👤 Shigeru Iguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:46
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053; G03C8/00; Y; Y10; Y10S; Y10S430/00; Y10S430/162; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
28 words
A photographic element having a photographic layer containing a conversion mixture of a polyvinyl alcohol having a saponification degree of 98% or more and an ethylene-maleic anhydride copolymer.
Claim 2
Dependent Claim
28 words
A photographic element having a photographic layer containing a conversion mixture of a polyvinyl alcohol having a saponification degree of 98% or more and an ethylene-maleic anhydride copolymer.
Claim 3
Dependent Claim
18 words
A photographic element of claim 1, wherein the polyvinyl alcohol has a polymerization degree of 300 to 2,000.
Claim 4
Dependent Claim
24 words
A photographic element of claim 1, wherein the conversion mixture contains the ethylene-maleic anhydride copolymer having an average molecular weight of 8,000 to 100,000.
Claim 5
Dependent Claim
35 words
A photographic element of claim 1, wherein the conversion mixture contains the polyvinyl alcohol constituent and ethylene-maleic anhydride copolymer constituent in a proportion of 1,000 g of the former and 100-500 g of the latter.
Claim 6
Dependent Claim
22 words
A photographic element of claim 1, wherein the photographic layer is an image receiving layer of the silver complex diffusion transfer element.
Claim 7
Dependent Claim
26 words
A photographic element of claim 1, wherein the amount of the conversion mixture contained in the photographic layer is at least 5% based on the layer.
Claim 8
Dependent Claim
16 words
A photographic element of claim 1, wherein the photographic layer contains the conversion mixture and gelatin.
Claim 9
Dependent Claim
21 words
A photographic element of claim 1, wherein the photographic layer is present in contact with a resin-coated surface of a support.
Claim 10
Dependent Claim
37 words
A photographic element according to claim 1 wherein the polyvinyl alcohol has a polymerization degree of 300 to 2,000 and the conversion mixture contains an ethylene-maleic anhydride copolymer having an average molecular weight of 8,000 to 100,000.
Claim 11
Dependent Claim
36 words
A photographic element according to claim 9 wherein the conversion mixture contains the polyvinyl alcohol constituent and ethylene-maleic anhydride copolymer constituent in a proportion of 1,000 g of the former and 100-500 g of the latter.
Claim 12
Dependent Claim
23 words
A photographic element according to claim 10 wherein the photographic layer is an image receiving layer of the silver complex diffusion transfer element.
Claim 13
Dependent Claim
37 words
A photographic element according to claim 1 wherein the conversion mixture is obtained by heating a mixture consisting of polyvinyl alcohol having a saponification degree of at least 98% and an ethylene-maleic anhydride copolymer in aqueous solution.
References Cited (Backward Citations)
US2957767A
Cited
US3544327A
Cited
US3730726A
Cited
US3723127A
Cited
US3707370A
Cited
US4119463A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-31 | 1985-03-02 | 1985-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-31 | 1989-03-02 | 1989-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-31 | 1993-03-02 | 1993-09-01 | $7700.00 | Window Closed / Lapsed |