US2924607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of oxetanes
Assignee: EIDP Inc
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Filing: 1957-10-18
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Granted: 1960-02-09
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Expires: 1977-10-18
Abstract
No abstract record available.
Inventors
- 👤 Dexter B Pattison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:52
CPC Classifications
C; C07; C07D; C07D305/00; C07D305/02; C07D305/04; C07D305/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
THE PROCESS FOR PREPARING 3,3-DISUBISTITUTED OXETANES WHICH COMPRISES HEATING THE CYCLIC CARBONATE ESTER OF 2,2-DISUBSTITUTED 1,3-PROPANEDIOL IN WHICH ONE SUBSTITUENT IS AN ALKYL GROUP OF 1-4 CARBON ATOMS AND THE OTHER SUBSTITUENT IS A MEMBER OF THE GROUP CONSISTING OF ALKYL GROUPS OF 2-4 CARBON ATOMS AND AN ALLYLOXYMETHYL GROUP AT A TEMPERATURE OF FROM ABOUT 175*C. TO ABOUT 240*C. IN THE PRESENCE OF FROM ABOUT .015% TO ABOUT 16% BY WEIGHT OF LITHIUM IN THE FORM OF A MEMBER OF THE GROUP CONSISTING OF INORGANIC LITHIUM SALTS, LITHIUM HYDROXIDE, LITHIUM OXIDE AND LITHIUMM SALTS, LITHIUM RATING THE CORRESPONDING 3,3-DISUBSTITUTED OXETANE FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
105 words
THE PROCESS FOR PREPARING 3,3-DISUBISTITUTED OXETANES WHICH COMPRISES HEATING THE CYCLIC CARBONATE ESTER OF 2,2-DISUBSTITUTED 1,3-PROPANEDIOL IN WHICH ONE SUBSTITUENT IS AN ALKYL GROUP OF 1-4 CARBON ATOMS AND THE OTHER SUBSTITUENT IS A MEMBER OF THE GROUP CONSISTING OF ALKYL GROUPS OF 2-4 CARBON ATOMS AND AN ALLYLOXYMETHYL GROUP AT A TEMPERATURE OF FROM ABOUT 175*C. TO ABOUT 240*C. IN THE PRESENCE OF FROM ABOUT .015% TO ABOUT 16% BY WEIGHT OF LITHIUM IN THE FORM OF A MEMBER OF THE GROUP CONSISTING OF INORGANIC LITHIUM SALTS, LITHIUM HYDROXIDE, LITHIUM OXIDE AND LITHIUMM SALTS, LITHIUM RATING THE CORRESPONDING 3,3-DISUBSTITUTED OXETANE FROM THE REACTION MIXTURE.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-08 | 1963-08-10 | 1964-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-08 | 1967-08-10 | 1968-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-08 | 1971-08-10 | 1972-02-09 | $7700.00 | Window Closed / Lapsed |