US3759876A
Expired / Lapsed
US
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Lactam polymerization with amide initiators
Assignee: Union Carbide Corp
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Filing: 1971-09-24
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Granted: 1973-09-18
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Expires: 1991-09-24
Abstract
Abstract CERTAIN AMIDE COMPOUNDS BASED ON AROMATIC AMINES ARE UTILIZED AS POLYMERIZTION INITIATORS OR ACTIVATORS WITH ALKALINE CATALYSTS IN THE ANIONIC POLYMERIZATION OF LACTAM MONOMERS SO AS TO PROVIDE POLYMERIZATION SYSTEMS WHICH MAY BE UTILIZED IN A VARIETY OF MOLDING OPERATIONS.
Inventors
- 👤 M Matzner
- 👤 W Reichle
- 👤 Grath J Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:05
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14; C08G69/16; C08G69/18; C08G69/20
Claims Analysis
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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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |