US3257477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for flexible polyester-ether compositions
Assignee: Monsanto Co
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Filing: 1961-06-13
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Granted: 1966-06-21
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Expires: 1981-06-13
Abstract
No abstract record available.
Inventors
- 👤 Hedrick Ross Melvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:21
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08G63/56; C08G63/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
THE PROCESS OF PREPARING A POLYMERIC COMPOSITION CONSISTING OF REACTING AN ALKYLENE OXIDE, CONTAINING AT LEAST THREE CARBON ATOMS THEREIN, WITH A DICARBOXYLIC ACID ANHYDRIDE, WHEREIN AT LEAST 33 MOL PERCENT OF THE SAID ANHYDRIDE IS AN ETHYLENICALLY-UNSATURATED DICABOXYLIC ACID ANHYDRIDE , IN A MOL RATIO OF AT LEAST 3:1 UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS AND IN THE PRESENCE OF FROM ABOUT 0.1 TO ABOUT 5 MOL PERCENT, BASED ON THE ANHYDRIDE EMPLOYED IN THE REACTION, OF A CATIONIC POLYMERIZATION CATALYST SELECTED FROM A MEMBER OF THE GROUP CONSISTING OF ANTIMONY PENTACHLORIDE, STANNIC CHLORIDE, ZINC CHLORIDE, TITANIUM TETACHLORIDE AND COMBINATIONS OF STANNUS CHLORIDE, ANTIMONY TRIFLUORIDE, AND ANTIMONY TRICHLORIDE, EACH TOGETHER WITH AT LEAST ABOUT A STOICHIOMETRIC AMOUNT OF IODINE, AND SUBSEQUENTLY CROSS-LINKING THE POLESTER-ETHER COMPOSITION WITH FROM ABOUT 20 TO ABOUT 75 WEIGHT PERCENT, BASED ON THE WEIGHT OF THE TOTAL COMPOSITION, OF AN ETHYLENICALLY UNSATURATED POLYMERIZABLE COMPOUND, CHARACTERIZED BY THE PESENCE OF A TERMINAL METHYLENE RADICAL BONDED THROUGH ITS ETHYLENIC BOND TO A CARBON ATOM
Claim 2
Dependent Claim
165 words
THE PROCESS OF PREPARING A POLYMERIC COMPOSITION CONSISTING OF REACTING AN ALKYLENE OXIDE, CONTAINING AT LEAST THREE CARBON ATOMS THEREIN, WITH A DICARBOXYLIC ACID ANHYDRIDE, WHEREIN AT LEAST 33 MOL PERCENT OF THE SAID ANHYDRIDE IS AN ETHYLENICALLY-UNSATURATED DICABOXYLIC ACID ANHYDRIDE , IN A MOL RATIO OF AT LEAST 3:1 UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS AND IN THE PRESENCE OF FROM ABOUT 0.1 TO ABOUT 5 MOL PERCENT, BASED ON THE ANHYDRIDE EMPLOYED IN THE REACTION, OF A CATIONIC POLYMERIZATION CATALYST SELECTED FROM A MEMBER OF THE GROUP CONSISTING OF ANTIMONY PENTACHLORIDE, STANNIC CHLORIDE, ZINC CHLORIDE, TITANIUM TETACHLORIDE AND COMBINATIONS OF STANNUS CHLORIDE, ANTIMONY TRIFLUORIDE, AND ANTIMONY TRICHLORIDE, EACH TOGETHER WITH AT LEAST ABOUT A STOICHIOMETRIC AMOUNT OF IODINE, AND SUBSEQUENTLY CROSS-LINKING THE POLESTER-ETHER COMPOSITION WITH FROM ABOUT 20 TO ABOUT 75 WEIGHT PERCENT, BASED ON THE WEIGHT OF THE TOTAL COMPOSITION, OF AN ETHYLENICALLY UNSATURATED POLYMERIZABLE COMPOUND, CHARACTERIZED BY THE PESENCE OF A TERMINAL METHYLENE RADICAL BONDED THROUGH ITS ETHYLENIC BOND TO A CARBON ATOM
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |