US3060153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Activators for the polymerization of 2-pyrrolidone
Assignee: Monsanto Chemicals Ltd
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Filing: 1959-04-20
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Granted: 1962-10-23
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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
2026-11-08 16:13
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14; C08G69/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A PROCESS FOR POLMERIZING 2-PYRROLIDONE WHICH COMPRISES THE STEPS OF FORMING A MIXTURE UNDER ESSENTIALLY ANHYDROUS CONDITIONS CONTAINING MONOMERIC 2-PYRROLIDONE, A CATALYTIC AMOUNT OF AN ALKALINE POLYMERIZATION CATALYST SELECTED FROM THE GROUP CONSISTING OF ALKALI METALS; CARBONATES AND PYRROLIDONE SALTS OF ALKALI METALS; ALKALI METAL ALKYLS AND ARYLS; HYDRIDES, HYDROXIDES, ANDD OXIDES OF ALKALI METALS AND ALKALINE EARTH METALS; A FEW PERCENT BASED ON THE WEIGHT OF THE MIXTURE OF AN AROMATIC CARBONYL HALIDE, POLMERIZATION ACTIVATOR SELECTED FROM THE GROUP CONSISTING OF MONOCYCLIC AROYL HALIDE, DICYCLIC AROYL HALIDE, MONOCYCLIC ALKAROYL HALIDE, DICYCLICRES ALKAROYL HALIDE, ARYL ALKYL CARBONYL HALIDE AND MIXTURES THEREOF WITH A SLIGHT EXCESS OF CATALYST OVER ACTIVATOR BEING PRESENT IN SAID MIXTURE, AND A FEW PERCENT BASED ON THE WEIGHT OF THE MIXTURE OF AN ORGANIC ACID AMIDE COMPOUND HAVING THE FOLLOWING CHEMICAL FORMULA::
Claim 2
Dependent Claim
136 words
A PROCESS FOR POLMERIZING 2-PYRROLIDONE WHICH COMPRISES THE STEPS OF FORMING A MIXTURE UNDER ESSENTIALLY ANHYDROUS CONDITIONS CONTAINING MONOMERIC 2-PYRROLIDONE, A CATALYTIC AMOUNT OF AN ALKALINE POLYMERIZATION CATALYST SELECTED FROM THE GROUP CONSISTING OF ALKALI METALS; CARBONATES AND PYRROLIDONE SALTS OF ALKALI METALS; ALKALI METAL ALKYLS AND ARYLS; HYDRIDES, HYDROXIDES, ANDD OXIDES OF ALKALI METALS AND ALKALINE EARTH METALS; A FEW PERCENT BASED ON THE WEIGHT OF THE MIXTURE OF AN AROMATIC CARBONYL HALIDE, POLMERIZATION ACTIVATOR SELECTED FROM THE GROUP CONSISTING OF MONOCYCLIC AROYL HALIDE, DICYCLIC AROYL HALIDE, MONOCYCLIC ALKAROYL HALIDE, DICYCLICRES ALKAROYL HALIDE, ARYL ALKYL CARBONYL HALIDE AND MIXTURES THEREOF WITH A SLIGHT EXCESS OF CATALYST OVER ACTIVATOR BEING PRESENT IN SAID MIXTURE, AND A FEW PERCENT BASED ON THE WEIGHT OF THE MIXTURE OF AN ORGANIC ACID AMIDE COMPOUND HAVING THE FOLLOWING CHEMICAL FORMULA::
References Cited (Backward Citations)
FR1093850A
Cited
US2891038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-22 | 1966-04-23 | 1966-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-22 | 1970-04-23 | 1970-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-22 | 1974-04-23 | 1974-10-23 | $7700.00 | Window Closed / Lapsed |