US2593787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of polymerizable unsaturated dicarboxylic acid polyesters and mixtures thereof withvinylic monomers
Assignee: PPG Industries Inc
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Filing: 1951-03-30
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Granted: 1952-04-22
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Expires: 1971-03-30
Abstract
No abstract record available.
Inventors
- 👤 Earl E Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:32
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/19
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
73 words
AS A NEW COMPOSITION OF MATTER A COPOLYMERIZABLE MIXTURE OF: (A) A POLESTER OF A DIHYDRIC ALCOHOL AMD AN ALPHA-BETA DICARBOXYLIC, ALPHA-BETA ETHYLENICALLY UNSATURATED ACID AND (B) AN ETHYLENICALLY UNSATURATED COMPOUND COPOLYMERIZABLE WITH THE POLYESTER, SAID MIXTURE BEING STABILIZED AGAINST GELATION IN THE ABSENCE OF PEROXIDE CATALYSTS BY A SMALL EFFECTIVE AMOUNT OF A DISSOLVED ADDED SALT OF A QUATERNARY AMMONIUM HYDROXIDE AND A NON-OXIDIZING ACID AT LEAST AS STRONG AS ACETIC ACID.
References Cited (Backward Citations)
US2255313A
Cited
GB540167A
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US2361538A
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US2351658A
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US2351664A
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US2453666A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-22 | 1955-10-22 | 1956-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-22 | 1959-10-22 | 1960-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-22 | 1963-10-22 | 1964-04-22 | $7700.00 | Window Closed / Lapsed |