US3027356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of nu-substituted polyamides
Assignee: BASF SE
•
Filing: 1959-07-03
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Granted: 1962-03-27
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Expires: 1979-07-03
Abstract
No abstract record available.
Inventors
- 👤 Schickh Otto Von
- 👤 Gehm Robert
- 👤 Paul Ursula Renate Doris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:59
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
PROCESS FOR THE PRODUCTION OF N-SUBSTITUTED POLYAMIDES WHICH COMPRISES HEATING FROM 200* TO 300*C. A LACTAM OF AN W-AMINO CARBOXYLIC ACID WITH FROM 7 TO 12 CARBON ATOMS IN THE RING, SAID LACTAM BEING SUBSTITUTED ON ITS NITROGEN ATOM BY AN ALKYL RADICAL WITH FROM 1 TO 6 CARBON ATOMS, IN THE PRESENCE OF A CAPROLACTAM POLYMERIZATION CATALYST WHICH IN AQUEOUS SOLUTION EXHIBITS A PH OF NOT MORE THAN 7.
Claim 2
Dependent Claim
70 words
PROCESS FOR THE PRODUCTION OF N-SUBSTITUTED POLYAMIDES WHICH COMPRISES HEATING FROM 200* TO 300*C. A LACTAM OF AN W-AMINO CARBOXYLIC ACID WITH FROM 7 TO 12 CARBON ATOMS IN THE RING, SAID LACTAM BEING SUBSTITUTED ON ITS NITROGEN ATOM BY AN ALKYL RADICAL WITH FROM 1 TO 6 CARBON ATOMS, IN THE PRESENCE OF A CAPROLACTAM POLYMERIZATION CATALYST WHICH IN AQUEOUS SOLUTION EXHIBITS A PH OF NOT MORE THAN 7.
References Cited (Backward Citations)
US2241321A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-26 | 1965-09-25 | 1966-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-26 | 1969-09-25 | 1970-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-26 | 1973-09-25 | 1974-03-27 | $7700.00 | Window Closed / Lapsed |