US2469696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing water-soluble polyacrylamide
Assignee: Eastman Kodak Co
•
Filing: 1946-07-22
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Granted: 1949-05-10
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Expires: 1966-07-22
Abstract
No abstract record available.
Inventors
- 👤 Louis M Minsk
- 👤 William O Kenyon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:27
CPC Classifications
C; C07; C07D; C07D211/00; C07D211/04; C07D211/80; C07D211/84; C07D211/86; C07D211/88; C08; C08F; C08F8/00; C08F8/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1984417A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-09 | 1952-11-08 | 1953-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-09 | 1956-11-08 | 1957-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-09 | 1960-11-08 | 1961-05-10 | $7700.00 | Window Closed / Lapsed |