US3756994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinyl aromatic aminimides and polymers thereof
Assignee: Ashland LLC
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Filing: 1971-09-13
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Granted: 1973-09-04
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Expires: 1991-09-13
Abstract
Abstract WHEREIN R IS A HYDROGEN, METHYL, OR HALOGEN; N IS ZERO OR ONE AND R1, R2, AND R3 ARE HYDROCARBON RADICALS AND R1 AND R2 CAN BE COMBINED TO FORM A HETEROCYLIC RING WITH THE NITROGEN. CH2=C(-R)-C6H4-(CH2)N-CO-N(-)-N(+)(-R1)(-R2)-R3 VINYL AROMATIC AMINIMIDES ARE PREPARED FROM VINYL AROMATIC ACIDS OR DERIVATIVES THEREOF. THE VINYL AROMATIC AMINIMIDE CAN BE HOMOPOLYMERIZED AND COPOLYMERIZED TO RESULT IN FUNCTIONAL GROUP-CONTAINING POLYMERIC PRODUCTS CAPABLE OF THERMOSETTING. THE VINYL AROMATIC AMINIMIDES HAVE THE GENERAL FORMULA
Inventors
- 👤 B Culbertson
- 👤 Killip W Mc
- 👤 E Sedor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:15
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C07; C07C; C07C243/00; C07C63/00; C07C63/68; C07C63/74; C08F2/00; C08F26/00; Y; Y10; Y10S; Y10S526/00; Y10S526/923
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |