US2593928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dimensionally stable diazotype photographic film and process for making it
Assignee: GAF Chemicals Corp
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Filing: 1947-10-09
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Granted: 1952-04-22
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Expires: 1967-10-09
Abstract
No abstract record available.
Inventors
- 👤 Sam C Slifkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:46
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/61; Y; Y10; Y10S; Y10S430/00; Y10S430/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A DIMENSIONALLY STABLE PHOTOPRINTING MATERIAL, CONSISTING OF A SELF-SUBSTAINING PRE-FORMED FILM OF A WATER-INSOLUBLE CELLULOSE ETHER, HAVING AT LEAST ONE SURFACE THEREOF IMPREGNATED WITH AN AQUEOUS SOLUTION OF A DIAZOTYPE SENSTIZING COMPOSITION CONTAINING A GAMMA-LACTONE OF 4 TO 6 CARBON ATOMS IN AN AMOUNT CONSTITUTING AT LEAST 5% OF THE SOLVENT COMPONENTS.
Claim 2
Dependent Claim
52 words
A DIMENSIONALLY STABLE PHOTOPRINTING MATERIAL, CONSISTING OF A SELF-SUBSTAINING PRE-FORMED FILM OF A WATER-INSOLUBLE CELLULOSE ETHER, HAVING AT LEAST ONE SURFACE THEREOF IMPREGNATED WITH AN AQUEOUS SOLUTION OF A DIAZOTYPE SENSTIZING COMPOSITION CONTAINING A GAMMA-LACTONE OF 4 TO 6 CARBON ATOMS IN AN AMOUNT CONSTITUTING AT LEAST 5% OF THE SOLVENT COMPONENTS.
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) | 1955-04-22 | 1955-10-22 | 1956-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-22 | 1959-10-22 | 1960-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-22 | 1963-10-22 | 1964-04-22 | $7700.00 | Window Closed / Lapsed |