US2977385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing lactone adducts
Assignee: Union Carbide Corp
•
Filing: 1956-04-13
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Granted: 1961-03-28
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Expires: 1976-04-13
Abstract
No abstract record available.
Inventors
- 👤 George W Fowler
- 👤 Thomas F Carruthers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:32
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/06; C08G63/08; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4266; C08G18/4269; C08G63/78; C08G63/82; C08G63/823
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
88 words
METHOD FOR PREPARING A HYDROXYL-TERMINATED POLYLACTONE ESTER WHICH COMPRISES HEATING A HYDROXYALKANOIC ACID LACTONE OF THE GROUP CONSISTING OF UNSUBSTITUTED AND LOWER ALKYL-SUBSTITUTED LACTONES HAVING FROM SIX TO EIGHT CARBON ATOMS IN THE RING WITH AN ORGANIC COMPOUND HAVING FROM ONE TO THREE REACTIVE HYDROGENS PRESENT IN A MEMBER OF THE GROUP CONSISTING OF HYDROXYL AND AMINO GROUPS AND IN THE PRESENCE OF A CATALYST OF THE GROUP CONSISTING OF ACETIC ACID, ACETIC ANHYDRIDE, 2-ETHYLHEXANOIC ACID AND BENZOIC ACID TO A TEMPERATURE BETWEEN ABOUT 50 AND ABOUT 250*C.
Claim 2
Dependent Claim
88 words
METHOD FOR PREPARING A HYDROXYL-TERMINATED POLYLACTONE ESTER WHICH COMPRISES HEATING A HYDROXYALKANOIC ACID LACTONE OF THE GROUP CONSISTING OF UNSUBSTITUTED AND LOWER ALKYL-SUBSTITUTED LACTONES HAVING FROM SIX TO EIGHT CARBON ATOMS IN THE RING WITH AN ORGANIC COMPOUND HAVING FROM ONE TO THREE REACTIVE HYDROGENS PRESENT IN A MEMBER OF THE GROUP CONSISTING OF HYDROXYL AND AMINO GROUPS AND IN THE PRESENCE OF A CATALYST OF THE GROUP CONSISTING OF ACETIC ACID, ACETIC ANHYDRIDE, 2-ETHYLHEXANOIC ACID AND BENZOIC ACID TO A TEMPERATURE BETWEEN ABOUT 50 AND ABOUT 250*C.
Claim 3
Dependent Claim
101 words
METHOD WHICH COMPRISES HEATING A LACTONE OF THE GROUP CONSISTING OF UNSUBSTITUTED AND LOWER ALKYL-SUBSTITUTED EPSILON-CAPROLACTONES WITH AN ALIPHATIC ALCOHOL HAVING UP TO TEN CARBON ATOMS AND FROM ONE TO THREE HYDROXYL GROUPS AND IN THE PRESENCE OF A CATALYST OF THE GROUP CONSISTING OF ACETIC ACID, ACETIC ANHYDRIDE, 2-ETHYLHEXANOIC ACID AND BENZOIC ACID TO A TEMPERATURE BETWEEN ABOUT 50 AND ABOUT 250*C. FOR FORMING A HYDROXYL-TERMINATED POLYLACTONE ESTER, AND REACTING SAID POLYLACTONE ESTER WITH A MEMBER OF THE GROUP CONSISTING OF MONOCARBOXYLIC ACIDS HAVING UP TO EIGHT CARBON ATOMS, DICARBOXYLIC ACIDS HAVING UP TO TEN CARBON ATOMS, AND THEIR ANHYDRIDES.
Claim 4
Dependent Claim
101 words
METHOD WHICH COMPRISES HEATING A LACTONE OF THE GROUP CONSISTING OF UNSUBSTITUTED AND LOWER ALKYL-SUBSTITUTED EPSILON-CAPROLACTONES WITH AN ALIPHATIC ALCOHOL HAVING UP TO TEN CARBON ATOMS AND FROM ONE TO THREE HYDROXYL GROUPS AND IN THE PRESENCE OF A CATALYST OF THE GROUP CONSISTING OF ACETIC ACID, ACETIC ANHYDRIDE, 2-ETHYLHEXANOIC ACID AND BENZOIC ACID TO A TEMPERATURE BETWEEN ABOUT 50 AND ABOUT 250*C. FOR FORMING A HYDROXYL-TERMINATED POLYLACTONE ESTER, AND REACTING SAID POLYLACTONE ESTER WITH A MEMBER OF THE GROUP CONSISTING OF MONOCARBOXYLIC ACIDS HAVING UP TO EIGHT CARBON ATOMS, DICARBOXYLIC ACIDS HAVING UP TO TEN CARBON ATOMS, AND THEIR ANHYDRIDES.
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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) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |