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US2664413A
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Preventing premature polymerization of resinifiable mixtures with oxalic acid
Assignee: PPG Industries Inc
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Filing: 1951-06-30
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Granted: 1953-12-29
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Expires: 1971-06-30
Abstract
No abstract record available.
Inventors
- 👤 Earl E Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:08
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/092
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
55 words
A COPOLYMERIZABLE MIXTURE OF A LIQUID ETHYLENIC COMPOUND CONTAINING THE GROUP >C=CH2 AND A POLYESTER OF A DIHYDRIC ALCOHOL AND AN ALPHA-BETA ETHYLENICALLY UNSATURATED DICARBOXYLIC ACID, SAID POLYESTER BEING COMPATIBLE WITH THE ETHYLENIC COMPOUND, SAID COMPOSITION CONTAINING A PEROXIDE CATALYST OF COPOLYMERIZATION IN CATALYTIC AMOUNT AND A SMALL POLYMERIZATION INHIBITING AMOUNT OF FREE OXALIC ACID.
References Cited (Backward Citations)
US2439677A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-28 | 1957-06-29 | 1957-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-28 | 1961-06-29 | 1961-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-28 | 1965-06-29 | 1965-12-29 | $7700.00 | Window Closed / Lapsed |