US2878236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of lactone polyesters
Assignee: Union Carbide Corp
•
Filing: 1956-04-13
•
Granted: 1959-03-17
•
Expires: 1976-04-13
Abstract
No abstract record available.
Inventors
- 👤 Donald M Young
- 👤 Hostettler Fritz
- 👤 Robert W Mclaughlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:00
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/82; C08G63/823
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN A METHOD OF PREPARING A POLYESTER BY HEATING A LACTONE HAVING FROM SIX TO EIGHT CARBON ATOMS IN THE RING WITH AN ORGANIC COMPOUND HAVING AT LEAST ONE REACTIVE RACICAL CAPABLE OF OPENING THE LACTONE RING, SAID RADICAL BEING A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROXYL AND AMINO RADICALS, SAID ORGANIC COMPOUND BEING REACTIVE WITH THE LACTONE ONLY BY VIRTUE OF SAID RADICALS, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE REACTION IN THE PRESENCE OF A CATALYTIC QUANTITY OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF CHELATES AND FATTY ACID ACYLATES OF A METAL IN GROUP IV-B, SAID GROUP IV-B BEING THAT SUB-GROUP OF THE PERIODIC TABLE WHOSE MEMBER OF LOWEST ATOMIC NUMBER IS TITANIUM.
Claim 2
Dependent Claim
119 words
IN A METHOD OF PREPARING A POLYESTER BY HEATING A LACTONE HAVING FROM SIX TO EIGHT CARBON ATOMS IN THE RING WITH AN ORGANIC COMPOUND HAVING AT LEAST ONE REACTIVE RACICAL CAPABLE OF OPENING THE LACTONE RING, SAID RADICAL BEING A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROXYL AND AMINO RADICALS, SAID ORGANIC COMPOUND BEING REACTIVE WITH THE LACTONE ONLY BY VIRTUE OF SAID RADICALS, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE REACTION IN THE PRESENCE OF A CATALYTIC QUANTITY OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF CHELATES AND FATTY ACID ACYLATES OF A METAL IN GROUP IV-B, SAID GROUP IV-B BEING THAT SUB-GROUP OF THE PERIODIC TABLE WHOSE MEMBER OF LOWEST ATOMIC NUMBER IS TITANIUM.
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) | 1962-03-16 | 1962-09-15 | 1963-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-16 | 1966-09-15 | 1967-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-16 | 1970-09-15 | 1971-03-17 | $7700.00 | Window Closed / Lapsed |