US2544392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Base-catalyzed vapor-phase production of ethers from alcohols and olefins
Assignee: Shell Development Co
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Filing: 1947-09-08
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Granted: 1951-03-06
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Expires: 1967-09-08
Abstract
No abstract record available.
Inventors
- 👤 Robert J Moore
- 👤 Gordon J O'donnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:27
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/01; C07C41/05; C07C41/06; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A PROCESS FOR THE PRODUCTION OF ETHERS WHICH COMPRISES CONTACTING ALKANOLS AND OLEFINS HAVING CRITICAL TEMPERATURES OF NOT MORE THAN ABOUT 350* C. IN THE PRESENCE OF A NON-VOLATILE ALKALINE MATERIAL COMPRISING AT LEAST ONE MATERIAL OF THE GROUP CONSISTING OF THE OXIDES AND HYDROXIDES OF THE ALKALINE REACTING METALS IN THE VAPOR PHASE AT A TEMPERATURE BETWEEN 100* C. AND 400* C. AND UNDER A PRESSURE OF BETWEEN 8 AND 10 ATMOSPHERES.
Claim 2
Dependent Claim
73 words
A PROCESS FOR THE PRODUCTION OF ETHERS WHICH COMPRISES CONTACTING ALKANOLS AND OLEFINS HAVING CRITICAL TEMPERATURES OF NOT MORE THAN ABOUT 350* C. IN THE PRESENCE OF A NON-VOLATILE ALKALINE MATERIAL COMPRISING AT LEAST ONE MATERIAL OF THE GROUP CONSISTING OF THE OXIDES AND HYDROXIDES OF THE ALKALINE REACTING METALS IN THE VAPOR PHASE AT A TEMPERATURE BETWEEN 100* C. AND 400* C. AND UNDER A PRESSURE OF BETWEEN 8 AND 10 ATMOSPHERES.
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) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |