US2642413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymers of phosphonic acid diamides with ureas
Assignee: Eastman Kodak Co
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Filing: 1951-12-07
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Granted: 1953-06-16
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Expires: 1971-12-07
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry W Coover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:53
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
19 words
A PROCESS FOR PREPARING A RESINOUS CONDENSATION POLYMER CHARACTERIZED BY CONTAINING IN THE POLYMER CHAIN THE RECURRING STRUCTURAL GROUP:
Claim 2
Dependent Claim
19 words
A PROCESS FOR PREPARING A RESINOUS CONDENSATION POLYMER CHARACTERIZED BY CONTAINING IN THE POLYMER CHAIN THE RECURRING STRUCTURAL GROUP:
References Cited (Backward Citations)
US2366129A
Cited
US2382309A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |