Patent US2941980A successfully refreshed from Google Patents.
US2941980A
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Composition containing vinyl pyrrolidone polymer stabilized with alkylated phenol
Assignee: GAF Chemicals Corp
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Filing: 1956-11-08
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Granted: 1960-06-21
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Expires: 1976-11-08
Abstract
No abstract record available.
Inventors
- 👤 Robinson Gerald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:35
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C09; C09J; C09J139/00; C09J139/04; C08L; C08L2666/00; C08L2666/28; C08L2666/34; Y; Y10; Y10S; Y10S424/00; Y10S424/02
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) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |