US3547638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N,n-disubstituted amino-methylthiocarboxylic acids and use thereof as antifoggants in photographic emulsions
Assignee: Eastman Kodak Co
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Filing: 1967-06-20
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Granted: 1970-12-15
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Expires: 1987-06-20
Abstract
No abstract record available.
Inventors
- 👤 Bernard C Cossar
- 👤 Delbert D Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:13
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/32; C07D239/42; C07D239/46; C07D239/47; C07D239/50; C07D239/52; C07D295/00; C07D295/04; C07D295/08; C07D295/084; C07D295/088; C09; C09B; C09B23/00; C09B23/0066; C09B23/14; C09B23/148; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/12; G03C1/28; G03C1/34; G03C1/346
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2948615A
Cited
US3043696A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |