Patent US3042659A successfully refreshed from Google Patents.
US3042659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Activators for the polymerization of 2-pyrrolidone
Assignee: Monsanto Chemicals Ltd
•
Filing: 1959-04-20
•
Granted: 1962-07-03
•
Expires: 1979-04-20
Abstract
No abstract record available.
Inventors
- 👤 Archie E Follett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:18
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14; C08G69/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A PROCESS FOR POLYMERIZING 2-PYRROLIDONE WHICH COMPRISES THE STEPS OF FORMING UNDER ESSENTIALLY ANHYDROUS CONDITIONS A MIXTURE CONTAINING MONOMERIC 2-PYRROLIDONE, A CATALYTIC AMOUNT OF AN ALKALINE POLYMERIZATION CATALYST, AND A FEW PERCENT BASED ON THE WEIGHT OF THE MIXTURE OF A N-MONOCARBONYL PYRROLIDONE POLYMERIZATION ACTIVATOR, WITH A SLIGHT EXCESS OF CATALYST OVER ACTIVATOR BEING PRESENT IN SAID MIXTURE AND A FEW PERCENT BASED ON THE WEIGHT OF SAID MIXTURE OF AN OPEN CHAIN ORGANIC ACID AMIDE HAVING THE FOLLOWING CHEMICAL FORMULA:
Claim 2
Dependent Claim
81 words
A PROCESS FOR POLYMERIZING 2-PYRROLIDONE WHICH COMPRISES THE STEPS OF FORMING UNDER ESSENTIALLY ANHYDROUS CONDITIONS A MIXTURE CONTAINING MONOMERIC 2-PYRROLIDONE, A CATALYTIC AMOUNT OF AN ALKALINE POLYMERIZATION CATALYST, AND A FEW PERCENT BASED ON THE WEIGHT OF THE MIXTURE OF A N-MONOCARBONYL PYRROLIDONE POLYMERIZATION ACTIVATOR, WITH A SLIGHT EXCESS OF CATALYST OVER ACTIVATOR BEING PRESENT IN SAID MIXTURE AND A FEW PERCENT BASED ON THE WEIGHT OF SAID MIXTURE OF AN OPEN CHAIN ORGANIC ACID AMIDE HAVING THE FOLLOWING CHEMICAL FORMULA:
References Cited (Backward Citations)
US2739959A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-02 | 1966-01-01 | 1966-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-02 | 1970-01-01 | 1970-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-02 | 1974-01-01 | 1974-07-03 | $7700.00 | Window Closed / Lapsed |