US3294765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylidene-bis-3 (nu-vinyl-2-pyrrolidone) and polymers thereof
Assignee: GAF Chemicals Corp
•
Filing: 1963-10-02
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Granted: 1966-12-27
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Expires: 1983-10-02
Abstract
No abstract record available.
Inventors
- 👤 Eugene V Hort
- 👤 Grosser Frederick
- 👤 Schwartz Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:34
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/18; C07D207/22; C07D207/24; C07D207/26; C07D207/263; C07D207/267; C02; C02F; C02F1/00; C02F1/52; C02F1/54
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
5 words
ETHYLIDENE-BIS-3(N-VINYL-2-PYRROLIDONE) HAVING THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
5 words
ETHYLIDENE-BIS-3(N-VINYL-2-PYRROLIDONE) HAVING THE FOLLOWING FORMULA:
Claim 3
Dependent Claim
16 words
POLYMERS OF POLYMERIZABLE VINYL COMPOUNDS COPOLYMERIZED AND CROSS-LINKED WITH 0.1% TO 50% BY WEIGHT OF ETHYLIDENE-BIS-3(N-VINYL-2-PYRROLIDONE).
Claim 4
Dependent Claim
16 words
POLYMERS OF POLYMERIZABLE VINYL COMPOUNDS COPOLYMERIZED AND CROSS-LINKED WITH 0.1% TO 50% BY WEIGHT OF ETHYLIDENE-BIS-3(N-VINYL-2-PYRROLIDONE).
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |