Patent US3141006A successfully refreshed from Google Patents.
US3141006A
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Anionic polymerization of lactams with dilactim ethers as cocatalysts
Assignee: EIDP Inc
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Filing: 1961-09-05
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Granted: 1964-07-14
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Expires: 1981-09-05
Abstract
No abstract record available.
Inventors
- 👤 Kohan Melvin Ira
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:06
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14; C08G69/16; C08G69/18; C08G69/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A PROCESS FOR THE RAPID POLYMERIZATION OF AN OMEGALACTAM HAVING FROM 4 TO 12 CARBON ATOMS IN THE LACTAM RING TO A SOLID POLYCARBOXYLAMIDE WHICH COMPRISES MIXING THE SUBSTANTIALLY ANHYDROUS OMEGA-LACTAM WITH AN ANIONIC CATALYST CONSISTING OF AN IMINIUM SALT OF AN OMEGA-LACTAM AND A COCATALYST CONSISTING OF A DILACTIIM ETHER OF THE FORMULA:
Claim 2
Dependent Claim
54 words
A PROCESS FOR THE RAPID POLYMERIZATION OF AN OMEGALACTAM HAVING FROM 4 TO 12 CARBON ATOMS IN THE LACTAM RING TO A SOLID POLYCARBOXYLAMIDE WHICH COMPRISES MIXING THE SUBSTANTIALLY ANHYDROUS OMEGA-LACTAM WITH AN ANIONIC CATALYST CONSISTING OF AN IMINIUM SALT OF AN OMEGA-LACTAM AND A COCATALYST CONSISTING OF A DILACTIIM ETHER OF THE FORMULA:
References Cited (Backward Citations)
US2356622A
Cited
US2767182A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-14 | 1968-01-13 | 1968-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-14 | 1972-01-13 | 1972-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-14 | 1976-01-13 | 1976-07-14 | $7700.00 | Window Closed / Lapsed |