Patent US3284417A successfully refreshed from Google Patents.
US3284417A
Expired / Lapsed
US
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Process for the preparation of lactone polyesters
Assignee: Union Carbide Corp
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Filing: 1963-11-13
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Granted: 1966-11-08
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Expires: 1983-11-13
Abstract
No abstract record available.
Inventors
- 👤 Hostettler Fritz
- 👤 Vineyard Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:29
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/82; C08G63/823; C08G63/02; C08G63/06; C08G63/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A PROCESS WHICH COMPRISES HEATING A LACTONE OF THE FORMMULA: O=C<(-O-CH(-R)-(C(-R)2)N-) WHEREIN N IS AN INTEGER OF FROM FOUR TO SIX, WHEREIN AT LEAST N+2 R''S ARE HYDROGEN, AND WHEREIN THE REMAINING R''S ARE OF THE GROUPS CONSISTING OF HYDROGEN,ALKYL, CYCLOALKYL, ALKOXY, AND SINGLE RING AROMATIC HYDROCARBON RADICALS; WITH AN ORGANIC FUNCTIONAL INITIATOR HAVING AT LEAST ONE REACTIVE HYDROGEN SUBSTITUTENT CAPABLE OF OPENING THE LACTONE RING; IN THE PRESENCE OF STANNOUS DICAYLATE AS THE CATATLYST THEREFOR; TO A TEMPERATURE OF AT LEAST ABOUT 50*C.; SAID LACTONE BEING IN SUFFICIENT MOLAR EXCESS WITH RELATION TO SAID ORGANIC FUNCTIONAL INITIATOR TO PRODUCE A PRODUCT HAVING AT LEAST TWO SUBSTANTIALLY LINEAR GROUPS OF THE FORMULA: -CO-(C(-R)2)N-CH(-R)-OWHEREIN THE VARIABLES N AND R HAVE THE AFORSAID MEANINGS; SAID PRODUCT HAVING AN AVERAGE MOLECULAR WEIGHT OF AT LEAST ABOUT 300.
Claim 2
Dependent Claim
134 words
A PROCESS WHICH COMPRISES HEATING A LACTONE OF THE FORMMULA: O=C<(-O-CH(-R)-(C(-R)2)N-) WHEREIN N IS AN INTEGER OF FROM FOUR TO SIX, WHEREIN AT LEAST N+2 R''S ARE HYDROGEN, AND WHEREIN THE REMAINING R''S ARE OF THE GROUPS CONSISTING OF HYDROGEN,ALKYL, CYCLOALKYL, ALKOXY, AND SINGLE RING AROMATIC HYDROCARBON RADICALS; WITH AN ORGANIC FUNCTIONAL INITIATOR HAVING AT LEAST ONE REACTIVE HYDROGEN SUBSTITUTENT CAPABLE OF OPENING THE LACTONE RING; IN THE PRESENCE OF STANNOUS DICAYLATE AS THE CATATLYST THEREFOR; TO A TEMPERATURE OF AT LEAST ABOUT 50*C.; SAID LACTONE BEING IN SUFFICIENT MOLAR EXCESS WITH RELATION TO SAID ORGANIC FUNCTIONAL INITIATOR TO PRODUCE A PRODUCT HAVING AT LEAST TWO SUBSTANTIALLY LINEAR GROUPS OF THE FORMULA: -CO-(C(-R)2)N-CH(-R)-OWHEREIN THE VARIABLES N AND R HAVE THE AFORSAID MEANINGS; SAID PRODUCT HAVING AN AVERAGE MOLECULAR WEIGHT OF AT LEAST ABOUT 300.
References Cited (Backward Citations)
US2890208A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |