Patent US3244521A successfully refreshed from Google Patents.
US3244521A
Expired / Lapsed
US
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Silver halide emulsions containing antifogging agents
Assignee: GAF Chemicals Corp
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Filing: 1961-11-02
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Granted: 1966-04-05
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Expires: 1981-11-02
Abstract
No abstract record available.
Inventors
- 👤 Dersch Fritz
- 👤 Robert J Clementi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:01
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/04; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C1/346
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
15 words
A PHOTOGRAPHIC DEVELOPER CONTAINING A DEVELOPING AGENT AND AN ANTIFOGGANT CHARACTERIZED BY THE GENERAL FORMULA:
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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |