US3766221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of glycidyl ethers
Assignee: Reichhold Albert Chemie AG
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Filing: 1971-02-22
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Granted: 1973-10-16
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Expires: 1991-02-22
Abstract
Abstract THE PRESENT INVENTION RELATES TO A PROCESS FOR THE MANUFACTURE OF GLYCIDYL ETHERS OF MONOHYDRIC OR POLYHYDRIC PHENOLS BY REACTION OF A MONOHYDRIC OR POLYHYDRIC PHENOL WITH EXCESS EPICHLOROHYDRIN IN AN ALKALINE MEDIUM, IN WHICH A MONOHYDRIC OR POLHYDRIC PHENOL IS REACTED WITH EXCESS EPICHLOROHYDRIN, RELATIVE TO THE PHENOLIC HYDROXYL GROUP, IN THE PRESENCE OF ABOUT ONE EQUIVALENT OF ALKALI HYDROXIDE PER EQUIVALENT OF PHENOLIC HYDROXYL GROUP, CHARACTERIZED IN THAT 3 TO 15 MOLS EPICHLOROHYDRIN PER MOL PHENOLIC HYDROXYL GROUP ARE REACTED.
Inventors
- 👤 W Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:04
CPC Classifications
C; C07; C07D; C07D303/00; C07D303/02; C07D303/12; C07D303/18; C07D303/20; C07D303/22; C07D303/24; C08; C08G; C08G59/00; C08G59/02; C08G59/022; C08G59/04; C08G59/06; C08G59/063
Claims Analysis
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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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |