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US2567076A
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Production of polyoxyethylene glycol superesters
Assignee: Union Carbide Corp
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Filing: 1947-11-06
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Granted: 1951-09-04
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Expires: 1967-11-06
Abstract
No abstract record available.
Inventors
- 👤 Samuel M Livengood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:18
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/66; C08G63/668; C08G63/672; C08G63/692; C08G63/6924; C08G63/695; C08G63/6954; C08G79/00; C08G79/02; C08G79/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
PROCESS FOR PRODUCING FROM POLYOXYETHYLENE GLYCOLS WAXY, WATER-SOLUBLE POLYMERIC ESTERS OF GREATLY INCREASED MOLECULAR WEIGHT, WHICH COMPRISES HEATING AND REACTING A SUBSTANTIALLY DRY POLYOXYETHYLENE GLYCOL HAVING AN AVERAGE MOLECULAR WEIGHT OF AT LEAST 4,000 WITH A HALOGEN-CONTAINING COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE HALIDES AND OXYHALIDES OF PHOSPHORUS, THE HALIDES OF SILICON, AND THE OXYHALIDES OF SULFUR, THE SAID GLYCOL AND SAID HALOGEN-CONTAINING COMPOUND BEIGN REACTED IN A MOLAR RATIO WITHIN THE RANGE BETWEEN 1:0.5 AND 1:2, IN THE PRESENCE OF AN INERT VOLATILE SOLVENT FOR THE REACTANTS, AND RECOVERING FROM THE REACTION MIXTURE THE WATER-SOLUBLE POLYMERIC ESTER THUS PRODUCED.
Claim 2
Dependent Claim
102 words
PROCESS FOR PRODUCING FROM POLYOXYETHYLENE GLYCOLS WAXY, WATER-SOLUBLE POLYMERIC ESTERS OF GREATLY INCREASED MOLECULAR WEIGHT, WHICH COMPRISES HEATING AND REACTING A SUBSTANTIALLY DRY POLYOXYETHYLENE GLYCOL HAVING AN AVERAGE MOLECULAR WEIGHT OF AT LEAST 4,000 WITH A HALOGEN-CONTAINING COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE HALIDES AND OXYHALIDES OF PHOSPHORUS, THE HALIDES OF SILICON, AND THE OXYHALIDES OF SULFUR, THE SAID GLYCOL AND SAID HALOGEN-CONTAINING COMPOUND BEIGN REACTED IN A MOLAR RATIO WITHIN THE RANGE BETWEEN 1:0.5 AND 1:2, IN THE PRESENCE OF AN INERT VOLATILE SOLVENT FOR THE REACTANTS, AND RECOVERING FROM THE REACTION MIXTURE THE WATER-SOLUBLE POLYMERIC ESTER THUS PRODUCED.
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) | 1954-09-03 | 1955-03-05 | 1955-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-03 | 1959-03-05 | 1959-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-03 | 1963-03-05 | 1963-09-04 | $7700.00 | Window Closed / Lapsed |