Patent US4675245A successfully refreshed from Google Patents.
US4675245A
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US
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Photographic paper support
Assignee: Felex Schoeller Jr and GmbH and Co KG
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Filing: 1984-06-19
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Granted: 1987-06-23
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Expires: 2004-06-19
Abstract
Abstract A photographic paper support made of a water-repellent sized base paper coated on both sides with a waterproof synthetic resin, and wherein the paper contains a combination of sizing substances including a water-repellent sizing agent, a cationic strengthening retention and binding agent and a sulfate or phosphate ester of a polysaccharide. The water-repellent sizing agent relative to the paper fiber content is about 0.2 to 2% by weight, the cationic strengthening and binding agent is greater in amount than about 1.5 of the water-repellent sizing agent, and the amount of the esterified polysaccharide is about 0.1 to 10% by weight relative to the fiber content.
Inventors
- 👤 Walter P. M. Von Meer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:18
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/17; D21H17/14; D21H17/15; D21H17/16; D21H17/20; D21H17/21; D21H17/24; D21H19/00; D21H19/80; D21H19/84; G; G03; G03C; G03C1/00; G03C1/76; G03C1/775; G03C1/79; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/258; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31902; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31993; Y10T428/31996
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
51 words
A photographic paper support made of a water-repelling sized base paper coated on both sides with a waterproof synthetic resin, said base paper containing a combination of internal sizing substances therein including a water-repellent sizing agent, a cationic strengthening and binding agent and a sulphate or phosphate ester of a polysaccharide.
Claim 2
Dependent Claim
51 words
A photographic paper support made of a water-repelling sized base paper coated on both sides with a waterproof synthetic resin, said base paper containing a combination of internal sizing substances therein including a water-repellent sizing agent, a cationic strengthening and binding agent and a sulphate or phosphate ester of a polysaccharide.
Claim 3
Dependent Claim
63 words
The photographic paper support of claim 1, wherein the amount of water-repellent sizing agent relative to the paper fiber content in the base paper is about 0.2 to 2% by weight, the amount of cationic strenghtening agent is greater than the water-repellent sizing agent, and the amount of the esterified polysaccharide is at least about 0.1% by weight relative to said fiber content.
Claim 4
Dependent Claim
24 words
The photographic paper support of claim 2, wherein the amount of cationic strengthening agent is greater than about 1.5 times the water-repellent sizing agent.
Claim 5
Dependent Claim
27 words
The photographic paper support of claim 2, wherein the amount of said esterified polysaccharide is between about 0.1 to 10% by weight relative to said fiber content.
Claim 6
Dependent Claim
25 words
The photographic paper support of claim 1, wherein said polysaccharide is selected from the group consisting essentially of starch, cellulose, guaran, carubin, dextran or chitosan.
Claim 7
Dependent Claim
18 words
The photographic paper support of claim 1, wherein the substitution degree of said polysaccharide is greater than 0.05.
Claim 8
Dependent Claim
43 words
The photographic paper support of claim 1, wherein said water-repellent sizing agent is selected from the group consisting essentially of a dimeric alkylketene, a dimeric alkylarylketene an alkyl carboxylic acid anhydride, a metallic soap of an alkyl carboxyl acid or a mixture thereof.
Claim 9
Dependent Claim
17 words
The photographic paper support of claim 1, wherein said cationic strengthening agent is a nitrogen containing polymer.
Claim 10
Dependent Claim
34 words
The photographic paper support of claim 1, wherein the surfaces of the base paper under and in the synthetic resin coatings are also surface sized with a binding agent dissolved or dispersed in water.
Claim 11
Dependent Claim
25 words
The photographic paper support of claim 1, wherein at least one of the paper and coating layers contains a dye, color pigment and/or optical brightener.
Claim 12
Dependent Claim
17 words
The photographic paper support of claim 1, wherein the base paper includes synthetic materials in fiber form.
Claim 13
Dependent Claim
25 words
The photographic paper support of claim 1, wherein the synthetic resin coating is selected from the group consisting essentially of a polyolefin or olefin copolymer.
Claim 14
Dependent Claim
23 words
The photographic paper support of claim 1, wherein the synthetic resin coating is positioned on at least one side of two superimposed layers.
Claim 15
Dependent Claim
32 words
The photographic paper support of claim 1, wherein the synthetic resin coating on at least one side of the support is of a copolyacrylate or copolymethacrylate and is hardened by electron beams.
Claim 16
Dependent Claim
18 words
The photographic paper support of claim 1, wherein at least one of the synthetic resin coatings contains pigment.
Claim 17
Dependent Claim
43 words
The photographic paper support of claim 15, wherein said pigment is a pigment mixture comprising predominantly a titanium dioxide and includes a small amount of at least one colored pigment and a small amount of an alkaline earth oxide or alkaline earth carbonate.
Claim 18
Dependent Claim
129 words
The photographic paper support of claim 1, wherein said water-repellant sizing agent is selected from the group consisting essentially of a dimeric alkylketene, a dimeric alkylarylketene an alkyl carboxylic acid anhydride, a metallic soap of an alkyl carboxyl acid or a mixture thereof and is present in the amount of about 0.2 to 2% by weight relative to the paper fiber content in the base paper, said cationic strengthening agent is a nitrogen. containing polymer and is present in an amount of at least about 1.5 times the water-repellant sizing agent, and said esterified polysaccharide is selected from the group consisting essentially of starch, cellulose, guaran, carubin, dextran or chitosan and is present in an amount of between about 0.1 to 10% by weight relative to said fiber content.
Claim 19
Dependent Claim
32 words
The photographic paper support of claim 17, wherein said esterified polysaccharide is water soluble and is present in an amount of about 0.1 to 5% by weight relative to said fiber content.
Claim 20
Dependent Claim
34 words
The photographic paper support of claim 17, wherein said esterified polysaccharide is substantially not water soluble and is present in an amount of about 0.5 to 10% by weight relative to said fiber content.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-22 | 1990-12-22 | 1991-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-22 | 1994-12-22 | 1995-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-22 | 1998-12-22 | 1999-06-23 | $7700.00 | Window Closed / Lapsed |