US2615807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stripping film and method of stripping
Assignee: EIDP Inc
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Filing: 1949-02-11
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Granted: 1952-10-28
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Expires: 1969-02-11
Abstract
No abstract record available.
Inventors
- 👤 Umberger Jacob Quentin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 01:42
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/805; G03C7/00; G03C7/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
33 words
A PROCESS FOR MODIFYING THE SOLUBILITY CHARACTERISTICS OF THE STRIPPING LAYER OF A PHOTOGRAPHIC ELEMENT, SAID LAYER CONSISTING OF A WATERSOLUBLE MACROMOLECULAR ACETAL OF A HYDROXY POLYMER HAVING A PLURALITY OF RECURING INTRALINEAR
Claim 2
Dependent Claim
33 words
A PROCESS FOR MODIFYING THE SOLUBILITY CHARACTERISTICS OF THE STRIPPING LAYER OF A PHOTOGRAPHIC ELEMENT, SAID LAYER CONSISTING OF A WATERSOLUBLE MACROMOLECULAR ACETAL OF A HYDROXY POLYMER HAVING A PLURALITY OF RECURING INTRALINEAR
Claim 3
Dependent Claim
42 words
A PHOTOGRAPHIC ELEMENT COMPRISING A FILM BASE HAVING SUPERIMPOSED ON ONE SURFACE TWO LIGHT-SENSITIVE SILVER HALIDE EMULSION LAYERS WHICH ARE SEPARATED BY A STRIPPING LAYER CONSISTING ESSENTIALLY OF AN INSOLUBLE MARCROMOLECULAR ACETAL OF A HYDROXYL POLYMER HAVING A PLURALITY OF RECURRING INTRALINEAR
Claim 4
Dependent Claim
42 words
A PHOTOGRAPHIC ELEMENT COMPRISING A FILM BASE HAVING SUPERIMPOSED ON ONE SURFACE TWO LIGHT-SENSITIVE SILVER HALIDE EMULSION LAYERS WHICH ARE SEPARATED BY A STRIPPING LAYER CONSISTING ESSENTIALLY OF AN INSOLUBLE MARCROMOLECULAR ACETAL OF A HYDROXYL POLYMER HAVING A PLURALITY OF RECURRING INTRALINEAR
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) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |