US3308099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of polylactams
Assignee: Rhodiaceta SA
•
Filing: 1963-03-21
•
Granted: 1967-03-07
•
Expires: 1983-03-21
Abstract
No abstract record available.
Inventors
- 👤 Mermoud Charles
- 👤 Abeille Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:41
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
59 words
PROCESS FOR THE PRODUCTION OF A LINEAR POLYAMIDE WHICH COMPRISES HEATING A LACTAM OF AT LEAST 5 CARBON ATOMS UNDER ANHYDROUS CONDITIONS AT BETWEEN 130*C. AND THE MELTING POINT OF THE POLYAMIDE PRODUCT IN THE PRESENCE OF AN ALKALINE ANIONIC CATALYST TOGETHER WITH, AS COCATALYST, 0.1 TO 5% BY WEIGHT OF THE LACTAM OF A LINEAR POLYETHER OF FORMULA:
Claim 2
Dependent Claim
59 words
PROCESS FOR THE PRODUCTION OF A LINEAR POLYAMIDE WHICH COMPRISES HEATING A LACTAM OF AT LEAST 5 CARBON ATOMS UNDER ANHYDROUS CONDITIONS AT BETWEEN 130*C. AND THE MELTING POINT OF THE POLYAMIDE PRODUCT IN THE PRESENCE OF AN ALKALINE ANIONIC CATALYST TOGETHER WITH, AS COCATALYST, 0.1 TO 5% BY WEIGHT OF THE LACTAM OF A LINEAR POLYETHER OF FORMULA:
References Cited (Backward Citations)
US2241321A
Cited
US3028369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |