US3490911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hardeners for photographic gelatin
Assignee: Eastman Kodak Co
•
Filing: 1967-11-13
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Granted: 1970-01-20
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Expires: 1987-11-13
Abstract
No abstract record available.
Inventors
- 👤 Donald M Burness
- 👤 Stanley W Cowan
- 👤 Charles J Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:40
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/30; C; C07; C07C; C07C315/00; C07C315/04; C07C317/00; C07C317/16; C07C317/18; C07C323/00; C07C323/10; C07C323/11; C07C323/12; C08; C08L; C08L101/00
Claims Analysis
Total Claims: 0
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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) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |