US2646416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inhibition of gelation in unsaturated polyesters with salts of amines
Assignee: PPG Industries Inc
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Filing: 1950-10-20
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Granted: 1953-07-21
•
Expires: 1970-10-20
Abstract
No abstract record available.
Inventors
- 👤 Earl E Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:51
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/19
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
65 words
A POLYMERIZABLE MIXTURE COMPRISING (A) A POLYMERIZABLE POLYESTER OF A DIHYDRIC ALCOHOL AND A DICARBOXYLIC ETHENICALLY UNSATURATED ACID AND (B) A SMALL GELATIN INHIBITING AMOUNT OF A SALT OF A MONOAMINE AND AN ACID WHICH IS NO STRONGER AS AN OXIDIZING AGENT THAN SULFURIC ACID AND AT LEAST AS STONG IN ACID VALUE AS ACETIC ACID, SAID SALT BEING NON-ALKALINE AND SOLUBLE IN THE POLYESTER.
References Cited (Backward Citations)
US2225471A
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US2299128A
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GB540167A
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US2407861A
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US2409633A
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US2480928A
Cited
US2452669A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |