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US3068100A
Expired / Lapsed
US
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N-acylhomocysteine thiolactone stabilizers for photographic silver halide emulsions
Assignee: GAF Chemicals Corp
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Filing: 1960-11-14
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Granted: 1962-12-11
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Expires: 1980-11-14
Abstract
No abstract record available.
Inventors
- 👤 Dersch Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:24
CPC Classifications
C; C07; C07D; C07D333/00; C07D333/02; C07D333/04; C07D333/26; C07D333/30; C07D333/36; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C1/346
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A PHOTOGRAPHIC DEVELOPER SOLUTION COMPRISING AN ORGANIC DEVELOPIN G AGENT, AN ALKALI, AN ALKALI METAL SULFITE, AN ALKALI METAL BROMIDE AND AS AN ANTIFOGGANT, IN AN ANTIFOGGING AMOUNT, A COMPOUND HAVING THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
35 words
A PHOTOGRAPHIC DEVELOPER SOLUTION COMPRISING AN ORGANIC DEVELOPIN G AGENT, AN ALKALI, AN ALKALI METAL SULFITE, AN ALKALI METAL BROMIDE AND AS AN ANTIFOGGANT, IN AN ANTIFOGGING AMOUNT, A COMPOUND HAVING THE FOLLOWING 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) | 1965-12-10 | 1966-06-11 | 1966-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-10 | 1970-06-11 | 1970-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-10 | 1974-06-11 | 1974-12-11 | $7700.00 | Window Closed / Lapsed |