Patent US2520601A successfully refreshed from Google Patents.
US2520601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization promoters
Assignee: Individual
•
Filing: 1947-07-03
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Granted: 1950-08-29
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Expires: 1967-07-03
Abstract
No abstract record available.
Inventors
- 👤 Max M Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:56
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/28; C08F4/32; C08F283/00; C08F283/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
IN A METHOD OF CONTROLLING THE GELATION AND POLYMERIZATION OF A POLYMERIZABLE MIX COMPRISING A LIQUID POLYHYDRIC ALCOHOL ESTER OF AN ALPHAOLEFINIC DICARBOXYLIC ACID AND A LIQUID MONOMERIC, UNSATURATED, UNSYMMETRICAL POLYMERIZABLE COMPOUND IN WHICH THE UNSATURATION IS DUE TO A SINGLE TERMINAL ETHYLENE GROUP, AND IN WHICH THE ESTER IS SOLUBLE, AND WITH WHICH ESTER IT IS COPOLYMERIZABLE IN THE PRESENCE OF A PEROXY CATALYST, SAID CATALYST ALSO BEING PRESENT, THAT IMPROVEMENT WHICH COMPRISES THE STEP OF CONDUCTING THE POLYMERIZATION IN THE PRESENCE OF 0.001-10% CALCULATED ON THE WEIGHT OF THE FINISHED POLYMER OF AN ORGANIC PHOSPHINE AND AN ORGANIC PEROXIDE, SAID ORGANIC PHOSPHINE HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
108 words
IN A METHOD OF CONTROLLING THE GELATION AND POLYMERIZATION OF A POLYMERIZABLE MIX COMPRISING A LIQUID POLYHYDRIC ALCOHOL ESTER OF AN ALPHAOLEFINIC DICARBOXYLIC ACID AND A LIQUID MONOMERIC, UNSATURATED, UNSYMMETRICAL POLYMERIZABLE COMPOUND IN WHICH THE UNSATURATION IS DUE TO A SINGLE TERMINAL ETHYLENE GROUP, AND IN WHICH THE ESTER IS SOLUBLE, AND WITH WHICH ESTER IT IS COPOLYMERIZABLE IN THE PRESENCE OF A PEROXY CATALYST, SAID CATALYST ALSO BEING PRESENT, THAT IMPROVEMENT WHICH COMPRISES THE STEP OF CONDUCTING THE POLYMERIZATION IN THE PRESENCE OF 0.001-10% CALCULATED ON THE WEIGHT OF THE FINISHED POLYMER OF AN ORGANIC PHOSPHINE AND AN ORGANIC PEROXIDE, SAID ORGANIC PHOSPHINE 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) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |