US2448892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation of cellulose
Assignee: Eastman Kodak Co
•
Filing: 1945-01-01
•
Granted: 1948-09-07
•
Expires: 1965-01-01
Abstract
No abstract record available.
Inventors
- 👤 William O Kenyon
- 👤 Edward C Yackel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:39
CPC Classifications
C; C08; C08B; C08B15/00; C08B15/02; C08B15/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1699779A
Cited
US1934956A
Cited
US1939235A
Cited
US1948276A
Cited
US2233475A
Cited
US2232990A
Cited
US2256391A
Cited
US2338587A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-07 | 1952-03-08 | 1952-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-07 | 1956-03-08 | 1956-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-07 | 1960-03-08 | 1960-09-07 | $7700.00 | Window Closed / Lapsed |