Patent US3429061A successfully refreshed from Google Patents.
Patent US2716077A successfully refreshed from Google Patents.
US2716077A
Expired / Lapsed
US
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Process of producing material for use in the casting of photographic film support
Assignee: Gevaert Photo Producten NV
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Filing: 1952-07-11
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Granted: 1955-08-23
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Expires: 1972-07-11
Abstract
No abstract record available.
Inventors
- 👤 Adam Gustaaf
- 👤 Tritsmans Remi Gustave
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:47
CPC Classifications
B; B29; B29C; B29C41/00; B29C41/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
THE PROCESS OF PRODUCING A CASTING LAYER FOR THE MANUFACTURE OF PHOTOGRAPHIC FILM SUPPORT, WHICH COMPRISES COATING THE SURFACE OF A SHEET OF CELLULOSE LOWER FATTY ACID ESTER SOLUBLE IN AN ORGANIC SOLVENT WITH AN AQUEOUS SOLUTION OF GELATIN, ALLOWING THIS SOLUTION TO SET, SPREADING ON THE THUS OBTAINED GELATIN LAYER AN AQUEOUS SOLUTION CONTAINING FROM 3 TO 30 PERCENT BY WEIGHT OF ALKALI METAL HYDROXIDE, ALLOWING THE AQUEOUS SOLUTION TO DIFFUSE THROUGH THE GELATIN LAYER, SAPONIFYING SAID CELLULOSE LOWER FATTY ACID ESTER SHEET AND THAN REMOVING THE GELATIN LAYER.
Claim 2
Dependent Claim
90 words
THE PROCESS OF PRODUCING A CASTING LAYER FOR THE MANUFACTURE OF PHOTOGRAPHIC FILM SUPPORT, WHICH COMPRISES COATING THE SURFACE OF A SHEET OF CELLULOSE LOWER FATTY ACID ESTER SOLUBLE IN AN ORGANIC SOLVENT WITH AN AQUEOUS SOLUTION OF GELATIN, ALLOWING THIS SOLUTION TO SET, SPREADING ON THE THUS OBTAINED GELATIN LAYER AN AQUEOUS SOLUTION CONTAINING FROM 3 TO 30 PERCENT BY WEIGHT OF ALKALI METAL HYDROXIDE, ALLOWING THE AQUEOUS SOLUTION TO DIFFUSE THROUGH THE GELATIN LAYER, SAPONIFYING SAID CELLULOSE LOWER FATTY ACID ESTER SHEET AND THAN REMOVING THE GELATIN LAYER.
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) | 1958-08-22 | 1959-02-21 | 1959-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-22 | 1963-02-21 | 1963-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-22 | 1967-02-21 | 1967-08-23 | $7700.00 | Window Closed / Lapsed |