Patent US3850890A successfully refreshed from Google Patents.
US3850890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the anionic polymerization of pyrrolidone with fluoro-or chlorofluoro olefin as activator
Assignee: Montedison SpA
•
Filing: 1973-06-08
•
Granted: 1974-11-26
•
Expires: 1993-06-08
Abstract
Abstract 1. A PROCESS FOR THE ANIONIC POLYMERIZATION OF PYRROLIDONE TO A FIBER-FORMING POLYPYRROLIDONE WHICH COMPRISES POLYMERIZING SAID MONOMER IN CONTACT WITH A CATALYTIC SYSTEM CONSISTING ESSENTIALLY OF AN ALKALI METAL OR QUATERNARY AMMONIUM PYRROLIDONATE AND, AS ACTIVATOR, A SUBSTITUTED OLEFIN HAVING THE GENERAL FORMULA CF2=CFX WHEREIN X IS F, CL, CF3, CF2CL, CFCL2 OR CCL3.
Inventors
- 👤 A Ciaperoni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:14
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14; C08G69/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A PROCESS FOR THE ANIONIC POLYMERIZATION OF PYRROLIDONE TO A FIBER-FORMING POLYPYRROLIDONE WHICH COMPRISES POLYMERIZING SAID MONOMER IN CONTACT WITH A CATALYTIC SYSTEM CONSISTING ESSENTIALLY OF AN ALKALI METAL OR QUATERNARY AMMONIUM PYRROLIDONATE AND, AS ACTIVATOR, A SUBSTITUTED OLEFIN HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
43 words
A PROCESS FOR THE ANIONIC POLYMERIZATION OF PYRROLIDONE TO A FIBER-FORMING POLYPYRROLIDONE WHICH COMPRISES POLYMERIZING SAID MONOMER IN CONTACT WITH A CATALYTIC SYSTEM CONSISTING ESSENTIALLY OF AN ALKALI METAL OR QUATERNARY AMMONIUM PYRROLIDONATE AND, AS ACTIVATOR, A SUBSTITUTED OLEFIN HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |