US3076784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyethers from aryl halides and organic diols
Assignee: Bayer AG
•
Filing: 1958-01-20
•
Granted: 1963-02-05
•
Expires: 1978-01-20
Abstract
No abstract record available.
Inventors
- 👤 Schulte-Huermann Werner
- 👤 Schnell Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:03
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/487; C08G18/4879; C08G18/50; C08G18/5003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
POLYETHERS PREPARED BY THE PROCESS WHICH COMPRISES BOILING A MIXTURE OF AT LEAST 1 MOL OF A POLYHALOGEN AROMATIC COMPOUND HAVING A LEAST 3 HALOGEN ATOMS DIRECTLY ATTACHED TO AN AROMATIC RING AS ITS SOLE REACTIVE GROUPS, AT LEAST 1 MOL OF A DIOL HAVING AT LEAST 5 ATOMS IN THE CHAIN OTHER THAN THE HYDROXYL GROUPS, ABOUT 1.6 TO ABOU 2.0 MOLS OF ALKALI AND AN ORGANIC SOLVENT INERT TO THE REACTANTS AND SUBSTANTIALLY IMMISCIBLE WITH WATER AND REMOVING THE WATER FROM THE BOILING REACTION MIXTURE BY AZEOTROPIC DISTILLATION WITH SAID INERT ORGANIC SOLVENT UNTIL WATER NO LONGER DISTILLS OFF AZEOTROPICALLY.
Claim 2
Dependent Claim
102 words
POLYETHERS PREPARED BY THE PROCESS WHICH COMPRISES BOILING A MIXTURE OF AT LEAST 1 MOL OF A POLYHALOGEN AROMATIC COMPOUND HAVING A LEAST 3 HALOGEN ATOMS DIRECTLY ATTACHED TO AN AROMATIC RING AS ITS SOLE REACTIVE GROUPS, AT LEAST 1 MOL OF A DIOL HAVING AT LEAST 5 ATOMS IN THE CHAIN OTHER THAN THE HYDROXYL GROUPS, ABOUT 1.6 TO ABOU 2.0 MOLS OF ALKALI AND AN ORGANIC SOLVENT INERT TO THE REACTANTS AND SUBSTANTIALLY IMMISCIBLE WITH WATER AND REMOVING THE WATER FROM THE BOILING REACTION MIXTURE BY AZEOTROPIC DISTILLATION WITH SAID INERT ORGANIC SOLVENT UNTIL WATER NO LONGER DISTILLS OFF AZEOTROPICALLY.
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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) | 1966-02-04 | 1966-08-06 | 1967-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-04 | 1970-08-06 | 1971-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-04 | 1974-08-06 | 1975-02-05 | $7700.00 | Window Closed / Lapsed |