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Patent US3227740A successfully refreshed from Google Patents.
US3227740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of alkyl carbonates
Assignee: Union Oil Company of California
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Filing: 1963-02-25
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Granted: 1966-01-04
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Expires: 1983-02-25
Abstract
No abstract record available.
Inventors
- 👤 Donald M Fenton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:53
CPC Classifications
C; C07; C07C; C07C68/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
THE SYNTHESIS OF A CARBONATE FROM AN ALCOHOL SELECTED FROM THE CLASS CONSISTING OF ALICYCLIC AND ALIPHATIC PRIMARY ALCOHOLS HAVING 1 TO ABOUT 25 CARBONS AND ALIPHATIC POLYOLS HAVING MOLECULAR WEIGHTS FROM 62 TO ABOUT 10,000 WHICH COMPRISES CONTACTING SAID ALCOHOL WITH CARBON MONOXIDE IN THE PRESENCE OF A MERCURIC SALT SELECTED FROM THE CLASS CONSISTING OF MERCURIC HALIDES AND CARBOXYLATES OF LOWER MOLECULAR WEIGHT CARBOXYLIC ACIDS AT A TEMPERATURE BETWEEN ABOUT 150* AND ABOUT 350*C. AND A PRESSURE FROM ABOUT 10 TO 10,000 P.S.I.G.
Claim 2
Dependent Claim
85 words
THE SYNTHESIS OF A CARBONATE FROM AN ALCOHOL SELECTED FROM THE CLASS CONSISTING OF ALICYCLIC AND ALIPHATIC PRIMARY ALCOHOLS HAVING 1 TO ABOUT 25 CARBONS AND ALIPHATIC POLYOLS HAVING MOLECULAR WEIGHTS FROM 62 TO ABOUT 10,000 WHICH COMPRISES CONTACTING SAID ALCOHOL WITH CARBON MONOXIDE IN THE PRESENCE OF A MERCURIC SALT SELECTED FROM THE CLASS CONSISTING OF MERCURIC HALIDES AND CARBOXYLATES OF LOWER MOLECULAR WEIGHT CARBOXYLIC ACIDS AT A TEMPERATURE BETWEEN ABOUT 150* AND ABOUT 350*C. AND A PRESSURE FROM ABOUT 10 TO 10,000 P.S.I.G.
References Cited (Backward Citations)
US2734913A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |