Patent US3848603A successfully refreshed from Google Patents.
US2563771A
Expired / Lapsed
US
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Carbonates of unsaturated diols
Assignee: Shell Development Co
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Filing: 1946-12-23
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Granted: 1951-08-07
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Expires: 1966-12-23
Abstract
No abstract record available.
Inventors
- 👤 David E Adelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:26
CPC Classifications
C; C08; C08F; C08F18/00; C08F18/02; C08F18/04; C08F18/08; C07; C07C; C07C69/00; C07C69/96
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
110 words
A CARBONATE OF AN OPEN-CHAIN, UNSATURATED DIHYDRIC ALCOHOL CONTAINING NO MORE THAN 20 CARBON ATOMS WHEREIN EACH OF THE TWO HYDROXYL GROUPS OF THE UNSATURATED DIOL IS ESTERIFIED BY A MEMBER OF THE GROUP CONSISTING OF CARBONIC ACID AND A MONOESTER OF (I) CARBONIC ACID AND (II) AN ALCOHOL ROH WHEREIN R IS AN OPEN-CHAIN HYDROCARBON RADICAL CONTAINING FROM 1 TO 18 CARBON ATOMS, SAID UNSATURATED DIOL POSSESSING AT LEAST ONE DOUBLE BOND BETWEEN TWO CARBON ATOMS OF ALIPHATIC CHARACTER ONE OF WHICH IS NOT MORE THAN TWO CARBON ATOMS REMOVED FROM A HYDROXY BEARING CARBON ATOM AND HAVING ONE DOUBLE BOND FOR EACH 6 CARBON ATOMS IN THE CHAIN.
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) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |