Patent US2742445A successfully refreshed from Google Patents.
US2742445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Styrene modified alkyd resins from 5-tertiary butyl isophthalic acid
Assignee: California Research LLC
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Filing: 1954-06-24
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Granted: 1956-04-17
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Expires: 1974-06-24
Abstract
No abstract record available.
Inventors
- 👤 Funston G Lum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:48
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
98 words
IN THE PROCESS OF PREPARING MODIFIED UNSATURATED POLYESTER RESINS BY THE COPOLYMERIZATION OF STYRENE WITH A BASE RESIN DERIVED FROM THE POLYMERIZATION OF A POLYHYDRIC ALCOHOL WITH BOTH AN ALIPHATIC ALPHA, BETA ETHYLENICALLY UNSATURATED DICARBOXYLIC ACID AND A BENZENE DICARBOXYLIC ACID, THE IMPROVEMENT OF INCREASING THE COMPATIBILITY OF THE STYRENE AND BASE RESIN WHICH COMPRISES EMPLOYING AS THE BENZENE DICARBOXYLIC ACID 5-TERTIARYBUTYL ISOPHTHALIC ACID IN AN AMOUNT RANGING FROM ABOUT 1 MOL FOR 4 MOLS OF THE ALIPHATIC ALPHA, BETA ETHYLENICALLY UNSATURATED DICARBOXYLIC ACID TO 1 MOL PER MOL OF THE ALIPHATIC ALPHA, BETA ETHYLENICALLY UNSATURATED DICARBOXYLIC ACID.
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) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |