Patent US4352861A successfully refreshed from Google Patents.
US4352861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic paper base with improved durability
Assignee: Felex Schoeller Jr and GmbH and Co KG
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Filing: 1980-10-08
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Granted: 1982-10-05
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Expires: 2000-10-08
Abstract
Abstract A photographic paper base comprises a base paper which bears two resin layers arranged one on top of the other on at least one side. The side of the paper which is destined to receive the photographic layer is coated with two resin layers lying one on top of the other, i.e., a first layer lying on the paper and the second layer arranged to contact the photographic layer. Only the second layer contains stabilizers and/or antioxidants, these being preferably in the range 0.03 to 2.0% by weight.
Inventors
- 👤 Walter von Meer
- 👤 Uwe Jensen
- 👤 Reiner Anthonsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:38
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/10; G; G03; G03C; G03C1/00; G03C1/76; G03C1/775; G03C1/79; B32B27/18; B32B27/20; B32B27/32; B32B2559/00; G03C1/005; G03C1/06; G03C1/32; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31902; Y10T428/31906
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
104 words
A photographic paper base comprising a base paper and first and second resin layers arranged one on top of the other on at least one side of said said base paper, said first resin layer lying on the paper and said second resin layer lying on the first layer and having a surface which is adapted to contact and receive a photographic layer, wherein said second layer includes a polyolefin and only said second layer at the time of application to said first layer contains at least one of stabilizer and antioxidant compositions for stabilization of said resins against degradation from oxidation or light.
Claim 2
Dependent Claim
104 words
A photographic paper base comprising a base paper and first and second resin layers arranged one on top of the other on at least one side of said said base paper, said first resin layer lying on the paper and said second resin layer lying on the first layer and having a surface which is adapted to contact and receive a photographic layer, wherein said second layer includes a polyolefin and only said second layer at the time of application to said first layer contains at least one of stabilizer and antioxidant compositions for stabilization of said resins against degradation from oxidation or light.
Claim 3
Dependent Claim
25 words
A paper base as claimed in claim 1, wherein said second resin layer contains said composition in the range of 0.03 to 2.0% by weight.
Claim 4
Dependent Claim
33 words
A paper base as claimed in claim 1, wherein said first resin layer is formed by a polymer or copolymer which is from the group consisting of ethylenic unsaturated hydrocarbons and chlorinated hydrocarbons.
Claim 5
Dependent Claim
35 words
A paper base as claimed in claim 3, wherein the polymer or copolymer is selected from the group consisting of polyethylene, polystyrene, polychloroprene, polyvinylidenechloride, styrene/butadiene copolymers, ethylene/vinylacetate copolymers, ethylene/acrylate copolymers, styrene/acrylate copolymers, and styrene/vinylidenechloride copolymers.
Claim 6
Dependent Claim
33 words
A paper base as claimed in claim 1, wherein said second resin layer is selected from the group consisting of polyethylene, a mixture of various polyethylenes and mixtures of polyethylene and other hydrocarbons.
Claim 7
Dependent Claim
41 words
A paper base as claimed in claim 1, wherein each of said resin layers contains further additives, selected from the group consisting of white pigments, color pigments for shading, antistatic compositions, lubricants, optical brighteners, UV absorbers, anti-haze compositions and antihalo compositions.
References Cited (Backward Citations)
US2756150A
Cited
US3161519A
Cited
US3369901A
Cited
US3755069A
Cited
US3682639A
Cited
US4169937A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-04 | 1986-04-05 | 1986-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-04 | 1990-04-05 | 1990-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-04 | 1994-04-05 | 1994-10-05 | $7700.00 | Window Closed / Lapsed |