Patent US2527262A successfully refreshed from Google Patents.
US2527262A
Expired / Lapsed
US
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Photographic layers containing gelatin-anion soap complexes and their preparation
Assignee: Ilford Imaging UK Ltd
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Filing: 1945-10-19
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Granted: 1950-10-24
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Expires: 1965-10-19
Abstract
No abstract record available.
Inventors
- 👤 Hart John Alfred Henry
- 👤 Pankhurst Kenneth Georg Alfred
- 👤 Smith Robert Charles Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:28
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/91; G03C1/93
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT BEARING A SUBLAYER CONSISTING ESSENTIALLY OF A COMPLEX OF GELATIN WITH AN ANION SOAP, WHICH COMPLEX IS SOLUBLE IN A SOLUTION COMPOSED OF METHYL ALCOHOL, SAID ELEMENT HAVING A LIGHT-SENSITIVE SILVER HALIDE EMULSION LAYER CONTIGUOUS WITH SAID SUBLAYER.
Claim 2
Dependent Claim
44 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT BEARING A SUBLAYER CONSISTING ESSENTIALLY OF A COMPLEX OF GELATIN WITH AN ANION SOAP, WHICH COMPLEX IS SOLUBLE IN A SOLUTION COMPOSED OF METHYL ALCOHOL, SAID ELEMENT HAVING A LIGHT-SENSITIVE SILVER HALIDE EMULSION LAYER CONTIGUOUS WITH SAID SUBLAYER.
References Cited (Backward Citations)
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Cited
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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) | 1953-10-23 | 1954-04-24 | 1954-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-23 | 1958-04-24 | 1958-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-23 | 1962-04-24 | 1962-10-24 | $7700.00 | Window Closed / Lapsed |