US3773513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dimensionally stable photographic paper containing glass fibers
Assignee: Xerox Corp
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Filing: 1969-09-12
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Granted: 1973-11-20
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Expires: 1989-09-12
Abstract
Abstract A dimensionally stable photographic paper is prepared by applying a photosensitive coating to a bleached softwood kraft fiber paper substrate containing from about 30 to 90 percent glass fibers. The paper base is prepared by adding from about 30 to 90 percent glass fiber to a bleached softwood kraft fiber pulp suspension just prior to passing the pulp through a paper making machine. The photographic paper of the instant invention has particular utility under conditions of high humidity.
Inventors
- 👤 R Macclaren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:13
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/775
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
31 words
The method of claim 1 wherein the sheet is externally sized with a synthetic thermoplastic resin selected from the group consisting of butadiene/styrene copolymers, polyacrylic polymers, and polyvinyl acetate-polyvinyl alcohol copolymers.
Claim 2
Dependent Claim
18 words
The method of claim 2 wherein a suspension of an internally sized bleached softwood kraft fibers is prepared.
Claim 3
Independent Claim
100 words
The method of preparing a dimensionally stable photographic paper comprising: a. beating a bleached softwood kraft fiber suspension, b. internally sizing the kraft fiber pulp, c. adding from about 50 to 80 percent by weight glass fibers to the suspension under conditions of mild agitation, d. preparing a sheet by passing the glass - cellulose fiber composition through a paper making machine, e. externally sizing the sheet with a synthetic thermoplastic resin selected from the group consisting of butadiene/styrene co-polymers, polyacrylic polymers, polyvinyl acetate-polyvinyl alcohol copolymers, and f. applying at least one photographically photosensitive coating to the externally sized sheet.
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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |