US2883370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymer of acrylonitrile, a quaternary ammonium compound and at least one additional comonomer
Assignee: Wyeth Holdings LLC
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Filing: 1954-10-19
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Granted: 1959-04-21
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Expires: 1974-10-19
Abstract
No abstract record available.
Inventors
- 👤 John A Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:10
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/42; Y; Y10; Y10S; Y10S526/00; Y10S526/923; Y10S8/00; Y10S8/92; Y10S8/927
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) | 1962-04-20 | 1962-10-20 | 1963-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-20 | 1966-10-20 | 1967-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-20 | 1970-10-20 | 1971-04-21 | $7700.00 | Window Closed / Lapsed |