US2492956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of unsaturated hydrocarbons from unsaturated ketones
Assignee: Shell Development Co
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Filing: 1946-10-01
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Granted: 1950-01-03
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Expires: 1966-10-01
Abstract
No abstract record available.
Inventors
- 👤 Seaver A Ballard
- 👤 Harry De V Finch
- 👤 Elbert A Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:11
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/20; C07C1/207; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/16; C07C2523/24; C07C2523/26; C07C2523/70; C07C2523/74; C07C2523/75; C07C2601/00; C07C2601/12; C07C2601/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
IN A PROCESS FOR THE PREPARATION OF A DIENE BY INTERACTION OF A NON-TERTIARY ALCOHOL AND AN ALPHA,BETA-OLEFINIC NON-AROMATIC KETONE CONTAINING AT LEAST SIX CARBON ATOMS, PASSING A GASEOUS MIXTURE COMPRISING AN ALCOHOL HAVING AT LEAST ONE HYDROGEN ATOM BONDED TO THE CARBON ATOM TO WHICH THE HYDROXYL GROUP IS LINKED AND AN ALPHA,BETA-OLEFINIC NON-AROMATIC KETONE CONTAINING AT LEAST SIX CARBON ATOMS AND HAVING A LINEAR GROUP OF AT LEAST FOUR CONTIGUOUS CARBON ATOMS INCLUDING THE CARBON ATOM OF THE CARBONYL GROUP INTO CONTACT AT A TEMPERATURE OF FROM ABOUT 200*C. TO ABOUT 400*C. WITH A CATALYST COMPRISING AN ADSORPTIVE ALUMINA COMPRISING PREDOMINANTLY A MEMBER OF THE GROUP CONSISTING OF ALUMINA ALPHA MONOHYDRATE, GAMMA ALUMINA, AND MIXTURES THEREOF, AND AN OXIDE OF A SECOND POLYVALENT METAL SELECTED FROM THE GROUP CONSISTING OF COBALT AND CHROMIUM.
Claim 2
Dependent Claim
135 words
IN A PROCESS FOR THE PREPARATION OF A DIENE BY INTERACTION OF A NON-TERTIARY ALCOHOL AND AN ALPHA,BETA-OLEFINIC NON-AROMATIC KETONE CONTAINING AT LEAST SIX CARBON ATOMS, PASSING A GASEOUS MIXTURE COMPRISING AN ALCOHOL HAVING AT LEAST ONE HYDROGEN ATOM BONDED TO THE CARBON ATOM TO WHICH THE HYDROXYL GROUP IS LINKED AND AN ALPHA,BETA-OLEFINIC NON-AROMATIC KETONE CONTAINING AT LEAST SIX CARBON ATOMS AND HAVING A LINEAR GROUP OF AT LEAST FOUR CONTIGUOUS CARBON ATOMS INCLUDING THE CARBON ATOM OF THE CARBONYL GROUP INTO CONTACT AT A TEMPERATURE OF FROM ABOUT 200*C. TO ABOUT 400*C. WITH A CATALYST COMPRISING AN ADSORPTIVE ALUMINA COMPRISING PREDOMINANTLY A MEMBER OF THE GROUP CONSISTING OF ALUMINA ALPHA MONOHYDRATE, GAMMA ALUMINA, AND MIXTURES THEREOF, AND AN OXIDE OF A SECOND POLYVALENT METAL SELECTED FROM THE GROUP CONSISTING OF COBALT AND CHROMIUM.
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) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |