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US2898349A
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Process for the manufacture of reaction products of epichlorhydrin and polyhydric alcohols
Assignee: BASF Schweiz AG
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Filing: 1954-03-17
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Granted: 1959-08-04
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Expires: 1974-03-17
Abstract
No abstract record available.
Inventors
- 👤 Zuppinger Paul
- 👤 Hofmann Walter
- 👤 Fisch Willi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:18
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/04; C07; C07D; C07D303/00; C07D303/02; C07D303/12; C07D303/18; C07D303/20; C07D303/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A SINGLE-STAGE PROCESS FOR THE MANUFACTURE OF A PRODUCT CONSISTING SUBSTANTIALLY OF POLYETHERS CONTAINING AT LEAST ONE GLYCIDYL GROUP, WHICH PROCESS COMPRISES REACTING ETHYLENE GLYCOL WITH 1 TO 5 MOLS OF EPICHLORHYDRIN AND ABOUT 1 MOL OF A STRONG ALKALI PER HYDROXYL-EQUIVALENT OF THE ETHYLENE GLYCOL, CONTINUOUSLY DISTILLING OFF WATER AND EPICHLORHYDRIN FROM THE REACTION MIXTURE, SEPARATING THE DISTILLED PRODUCTS FROM EACH OTHER AND RETURNING ONLY THE EPICHLORHYDRIN TO THE REACTION MIXTURE.
Claim 2
Dependent Claim
72 words
A SINGLE-STAGE PROCESS FOR THE MANUFACTURE OF A PRODUCT CONSISTING SUBSTANTIALLY OF POLYETHERS CONTAINING AT LEAST ONE GLYCIDYL GROUP, WHICH PROCESS COMPRISES REACTING ETHYLENE GLYCOL WITH 1 TO 5 MOLS OF EPICHLORHYDRIN AND ABOUT 1 MOL OF A STRONG ALKALI PER HYDROXYL-EQUIVALENT OF THE ETHYLENE GLYCOL, CONTINUOUSLY DISTILLING OFF WATER AND EPICHLORHYDRIN FROM THE REACTION MIXTURE, SEPARATING THE DISTILLED PRODUCTS FROM EACH OTHER AND RETURNING ONLY THE EPICHLORHYDRIN TO THE REACTION MIXTURE.
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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) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |