US3299012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of polylactones
Assignee: Monsanto Co
•
Filing: 1963-12-17
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Granted: 1967-01-17
•
Expires: 1983-12-17
Abstract
No abstract record available.
Inventors
- 👤 Roland J Kern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:01
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/14; C08F8/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
53 words
A PROCESS FOR REARRANGING INTERPOLYMERS OF OLEFINICALLY UNSATURATED CARBOXYLIC ANHYDRIDES AND VINYL ETHERS OF THE FORMULA R-O-CH=CH2, WHEREIN R REPRESENTS A RADICAL CAPABLE OF FORMING A STABLE CARBONIUM ION, WHICH COMPRISES CONTACTING SAID INTERPOLYMERS WITH A CATALYTIC QUANTITY OF A LEWIS ACID AND OBTAINING POLLYMERS CHARACTERIZED BY LACTONE GROUPS ALONG THE POLYMER CHAINS.
Claim 2
Dependent Claim
53 words
A PROCESS FOR REARRANGING INTERPOLYMERS OF OLEFINICALLY UNSATURATED CARBOXYLIC ANHYDRIDES AND VINYL ETHERS OF THE FORMULA R-O-CH=CH2, WHEREIN R REPRESENTS A RADICAL CAPABLE OF FORMING A STABLE CARBONIUM ION, WHICH COMPRISES CONTACTING SAID INTERPOLYMERS WITH A CATALYTIC QUANTITY OF A LEWIS ACID AND OBTAINING POLLYMERS CHARACTERIZED BY LACTONE GROUPS ALONG THE POLYMER CHAINS.
Claim 3
Dependent Claim
51 words
A PROCESS FOR THE PREPARATION OF ESTER LACTONES OF POLYMERS WHICH COMPRISES HEATING TO REACTION TEMPERATURE AN ALTERNATING COPOLYMER OF A TERT-ALKYL VINYL ETHER AND AN ANHYDRIDE SELECTED FROM THE GROUP CONSISTING OF MALEIC ANHYDRIDE, CITRACONIC ANHYDRIDE AND ITACONIC ANHYDRIDE WITH A CATALYTIC QUANTITY OF A LEWIS ACID AND AN ALCOHOL.
Claim 4
Dependent Claim
51 words
A PROCESS FOR THE PREPARATION OF ESTER LACTONES OF POLYMERS WHICH COMPRISES HEATING TO REACTION TEMPERATURE AN ALTERNATING COPOLYMER OF A TERT-ALKYL VINYL ETHER AND AN ANHYDRIDE SELECTED FROM THE GROUP CONSISTING OF MALEIC ANHYDRIDE, CITRACONIC ANHYDRIDE AND ITACONIC ANHYDRIDE WITH A CATALYTIC QUANTITY OF A LEWIS ACID AND AN ALCOHOL.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |