US3576827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing glycidyl esters of polycarboxylic acid anhydrides
Assignee: Hi Tek Polymers Inc
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Filing: 1969-05-12
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Granted: 1971-04-27
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Expires: 1989-05-12
Abstract
Abstract A PROCESS FOR PREPARING GLYCIDYL ESTERS OF POLYCARBOXYLIC ACID ANHYDRIDES BY CATALYTICALLY REACTING EPICHLOROHYDRIN AND A POLYCARBOXYLIC ACID ANHYDRIDE IN THE PRESENCE OF WATER OR BY REACTING WATER WITH THE POLYCARBOXYLIC ACID ANHYDRIDE IN THE PRESENCE OF EPICHLOROHYDRIN AND THEN CATALYZING THE EPICHLOROHYDRIN, HYDROLYZED POLYCARBOXYLIC ACID ANHYDRIDE REACTION WHEREIN THE ABOVE REACTIONS ARE CARRIED OUT AT A TEMPERATURE NO HIGHER THAN ABOUT 200* F. TO FORM CHLOROHYDRIN ESTERS FOLLOWED BY DEHYDROHALOGENATION WITH ALKALI MATAL HYDROXIDE AT A TEMPERATURE OF ABOUT 70*F. TO 150*F.
Inventors
- 👤 Clifford F Dukes
- 👤 James H Melloan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:49
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/40; C; C07; C07D; C07D303/00; C07D303/02; C07D303/12; C07D303/16; C08; C08G; C08G59/00; C08G59/02; C08G59/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |