US3553119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy resin ester production
Assignee: Cook Paint and Varnish Co
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Filing: 1968-12-18
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Granted: 1971-01-05
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Expires: 1988-12-18
Abstract
Abstract AN IMPROVEMENT IN THE PROCESS FOR THE PRODUCTION OF EPOXY RESIN ESTERS BY (1) ESTERIFYING THE WATER AND SODIUM CHLORIDE CONTAINING REACTION PRODUCT OF EPICHLOROHYDRIN AND BISPHENOL A WITH A FATTY ACID, (2) DISTILLING OFF WATER DURING ESTERIFICATION, (3) REDUCING THE PRODUCT WITH A SOLVENT FOR THE ESTER, AND (4) REMOVING SODIUM CHLORIDE BY-PRODUCT IN GRANULAR FORM. THE PROCESS GIVES AN ESTER CHARACTERIZED BY LIGHTER COLOR AND OTHER IMPROVED QUALITIES.
Inventors
- 👤 Howard J Wright
- 👤 Joseph H Scherer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:45
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/14; C08G59/1433; C08G59/1438; C08G59/1455
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |