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US2874141A
Expired / Lapsed
US
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Unsaturated polyester-vinyl monomer composition stabilized with 3, 6-di-n-propylcatechol and method of preparation
Assignee: PPG Industries Inc
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Filing: 1956-04-19
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Granted: 1959-02-17
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Expires: 1976-04-19
Abstract
No abstract record available.
Inventors
- 👤 Roger M Christenson
- 👤 Chester L Parris
- 👤 Earl E Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:49
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A METHOD OF INHIBITING PREMATURE GELATIN IN AN INTERPOLYMERIZABLE MIXTURE OF A MONOMER CONTAINING A <C=CH2 GROUP AND A POLYESTER OF A DIHYDRIC ALCOHOL ALCOHOL AND AN ALPHA-BETA ETHYLENIC DICARBOXYLIC ACID, WHICH COMPRISES INCORPORATING INTO THE MIXTURE 3,6-DI-N PROPYLCATECHOL, THE MONOMER IN SAID MIXTURE BEING ABOUT 10 TO ABOUT 50 PERCENT BY WEIGHT OF THE TOTAL MIXTURE AND THE 3,6-DI-N-PROPYL CATECHOL BEING ABOUT 0.001 TO ABOUT 0.1 PERCENT BY WEIGHT OF THE MIXTURE THE POLYESTER BEING SUBSTANTIALLY THE REST OF THE MIXTURE.
Claim 2
Independent Claim
82 words
A METHOD OF INHIBITING PREMATURE GELATIN IN AN INTERPOLYMERIZABLE MIXTURE OF A MONOMER CONTAINING A <C=CH2 GROUP AND A POLYESTER OF A DIHYDRIC ALCOHOL ALCOHOL AND AN ALPHA-BETA ETHYLENIC DICARBOXYLIC ACID, WHICH COMPRISES INCORPORATING INTO THE MIXTURE 3,6-DI-N PROPYLCATECHOL, THE MONOMER IN SAID MIXTURE BEING ABOUT 10 TO ABOUT 50 PERCENT BY WEIGHT OF THE TOTAL MIXTURE AND THE 3,6-DI-N-PROPYL CATECHOL BEING ABOUT 0.001 TO ABOUT 0.1 PERCENT BY WEIGHT OF THE MIXTURE THE POLYESTER BEING SUBSTANTIALLY THE REST OF THE MIXTURE.
References Cited (Backward Citations)
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |