US3342784A
Expired / Lapsed
US
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Anionic polymerization of lactams with amido-azoles as promoters
Assignee: BASF SE
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Filing: 1964-01-14
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Granted: 1967-09-19
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Expires: 1984-01-14
Abstract
No abstract record available.
Inventors
- 👤 Gehm Robert
- 👤 Steinbrunn Gustav
- 👤 Jentzsch Wolfgang
- 👤 Bayerlein Friedrich
- 👤 Schickh Otto Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:04
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
69 words
IN A PROCESS FOR THE ACTIVATED ANIONIC POLYMERIZATION OF LACTAMS BY HEATING A MIXTURE OF (A) LACTAM HAVING FROM FIVE TO FOURTEEN RING MEMBERS, (B) AN ALKALINE CATALYST SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL CATALYSTS AND ALKALINE EARTH METAL CATALYST S AND (C) AN ACTIVATOR TO A TEMPERATURE OF BETWEEN 80* AND 160*C., THE IMPROVEMENT WHICH COMPRISES ADDING AS THE ACTIVATOR A COMPOUND HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
69 words
IN A PROCESS FOR THE ACTIVATED ANIONIC POLYMERIZATION OF LACTAMS BY HEATING A MIXTURE OF (A) LACTAM HAVING FROM FIVE TO FOURTEEN RING MEMBERS, (B) AN ALKALINE CATALYST SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL CATALYSTS AND ALKALINE EARTH METAL CATALYST S AND (C) AN ACTIVATOR TO A TEMPERATURE OF BETWEEN 80* AND 160*C., THE IMPROVEMENT WHICH COMPRISES ADDING AS THE ACTIVATOR A COMPOUND HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
CA678677A
Cited
US3148174A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |