US3770849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lactam-vinyl block copolymers
Assignee: Union Carbide Corp
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Filing: 1971-02-01
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Granted: 1973-11-06
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Expires: 1991-02-01
Abstract
Abstract BLOCK COPOLYMERS ARE PREPARED FROM LACTAM MONOMER AND VINYL POLYMER HAVING THE STRUCTURE T-(C(-X1)(-X3)-C(-X2)(-X4))M-T'' WHEREIN X1, X2, X3 AND X4 ARE SELECTED SUBSTITUENT GROUPS, T AND T ARE SELECTED TERMINAL GROUP AND M IS A WHOLE NUMBER OF ABOUT 16 100.000. THE POLYMERS ARE PREPARED IN A LACTAM ANIONIC POLYUMERIZATION REACTION USING AN ALKALINE CATALYST AND THE VINYL POLYMER AS AN ACTIVATOR OR INITIATOR.
Inventors
- 👤 M Matzner
- 👤 Grath J Mc
- 👤 A Noshay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:50
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14; C08G69/16; C08G69/18; C08G69/20
Claims Analysis
Total Claims: 0
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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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |