Patent US1901605A successfully refreshed from Google Patents.
US2901457A
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Process of reacting a polymeric n-vinyl lactam with a polymeric carboxylic acid and product obtained thereby
Assignee: GAF Chemicals Corp
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Filing: 1954-11-15
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Granted: 1959-08-25
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Expires: 1974-11-15
Abstract
No abstract record available.
Inventors
- 👤 George G Stoner
- 👤 George C Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:22
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/24; C08J3/246; C08L; C08L39/00; C08L39/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A PROCESS COMPRISING REACTING A POLYMERIC N-VINYL LACTAM HAVING THE FORMULA
Claim 2
Dependent Claim
11 words
A PROCESS COMPRISING REACTING A POLYMERIC N-VINYL LACTAM HAVING THE FORMULA
References Cited (Backward Citations)
US2072465A
Cited
US2723248A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |