Patent US2740765A successfully refreshed from Google Patents.
US2740765A
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Quaternary ammonium compounds as accelerators of polymerization of ethylenic compounds
Assignee: PPG Industries Inc
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Filing: 1953-10-15
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Granted: 1956-04-03
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Expires: 1973-10-15
Abstract
No abstract record available.
Inventors
- 👤 Earl E Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:13
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A METHOD OF ACCELERATING THE POLYMERIZATION OF A MIXTURE OF (A) A POLYESTER OF A GLYCOL AND AN ALPHA-BETA ETHYLENICALLY UNSATURATED DICARBOXYLIC ACID, AND (B) A MONOMERIC COMPOUND CONTAINING A CH2=C< GROUP, SAID MIXTURE CONTAINING AS A GELATION INHIBITOR AT LEAST ABOUT 0.01 PER CENT OF A MEMBER OF THE CLASS CONSISTING OF QUINONES AND DIHYDRIC PHENOLS, WHICH COMPRISES ADDING TO SAID MIXTURE AT LEAST ABOUT 0.001 PER CENT BY WEIGHT OF THE POLYESTER OF A QUATERNARY AMMONIUM SALT OF A NONOXIDIZING ACID AT LEAST AS STRONG AS ACETIC ACID, IN THE PRESENCE OF A PEROXIDE POLYMERIZATION CATALYST.
Claim 2
Independent Claim
98 words
A METHOD OF ACCELERATING THE POLYMERIZATION OF A MIXTURE OF (A) A POLYESTER OF A GLYCOL AND AN ALPHA-BETA ETHYLENICALLY UNSATURATED DICARBOXYLIC ACID, AND (B) A MONOMERIC COMPOUND CONTAINING A CH2=C< GROUP, SAID MIXTURE CONTAINING AS A GELATION INHIBITOR AT LEAST ABOUT 0.01 PER CENT OF A MEMBER OF THE CLASS CONSISTING OF QUINONES AND DIHYDRIC PHENOLS, WHICH COMPRISES ADDING TO SAID MIXTURE AT LEAST ABOUT 0.001 PER CENT BY WEIGHT OF THE POLYESTER OF A QUATERNARY AMMONIUM SALT OF A NONOXIDIZING ACID AT LEAST AS STRONG AS ACETIC ACID, IN THE PRESENCE OF A PEROXIDE POLYMERIZATION CATALYST.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |