US2935404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fog reduction in photographic silver halide emulsions
Assignee: GAF Chemicals Corp
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Filing: 1958-05-27
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Granted: 1960-05-03
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Expires: 1978-05-27
Abstract
No abstract record available.
Inventors
- 👤 Fritz H Dersch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:11
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C1/346
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A LIGHT SENSITIVE PHOTOGRAPHIC MATERIAL COMPRISING A BASE AND A LIGHT SENSITIVE SILVER HALIDE EMULSION, SAID LIGHT SENSITIVE MATERIAL CONTAINING AS AN ANTIFOGGANT A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THOSE HAVING THE FOLLOWING FORMULAE:
Claim 2
Dependent Claim
36 words
A LIGHT SENSITIVE PHOTOGRAPHIC MATERIAL COMPRISING A BASE AND A LIGHT SENSITIVE SILVER HALIDE EMULSION, SAID LIGHT SENSITIVE MATERIAL CONTAINING AS AN ANTIFOGGANT A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THOSE HAVING THE FOLLOWING FORMULAE:
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) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |