Patent US2853535A successfully refreshed from Google Patents.
US2853535A
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Catalytic process for preparing a conjugate diene containing 5 to 8 carbon atoms by dehydrating a tertiary alcohol
Assignee: Sinclair Refining Co
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Filing: 1956-04-09
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Granted: 1958-09-23
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Expires: 1976-04-09
Abstract
No abstract record available.
Inventors
- 👤 Bernard S Friedman
- 👤 Seymour H Patinkin
- 👤 Willis C Keith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:38
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/20; C07C2521/00; C07C2521/10; C07C2523/00; C07C2523/70; C07C2523/74; C07C2523/745; C07C2527/00; C07C2527/14; C07C2527/16; C07C2527/167
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A METHOD FOR THE PREPARATION OF A CONJUGATED DIENE HYDROCARBON CONTAINING FROM 5 TO 8 CARBON ATOMS WHICH COMPRISES PASSING A MIXTURE OF STREAM AND A SATURATED TERTIARY ALIPHATIC MONOHYDRIC ALCOHOL HAVING FROM 5 TO 8 CARBON ATOMS INTO CONTACT WITH A CATALYST WHICH HAS DEHYDROGENATING ACTIVITY AND WHICH IS STEAM INSENSITIVE AT A TEMPERATURE WITHIN THE RANGE FROM ABOUT 1000*F. TO 1520*F. AT APPROXIMATELY ATMOSPHERIC PRESSURE.
Claim 2
Independent Claim
67 words
A METHOD FOR THE PREPARATION OF A CONJUGATED DIENE HYDROCARBON CONTAINING FROM 5 TO 8 CARBON ATOMS WHICH COMPRISES PASSING A MIXTURE OF STREAM AND A SATURATED TERTIARY ALIPHATIC MONOHYDRIC ALCOHOL HAVING FROM 5 TO 8 CARBON ATOMS INTO CONTACT WITH A CATALYST WHICH HAS DEHYDROGENATING ACTIVITY AND WHICH IS STEAM INSENSITIVE AT A TEMPERATURE WITHIN THE RANGE FROM ABOUT 1000*F. TO 1520*F. AT APPROXIMATELY ATMOSPHERIC PRESSURE.
References Cited (Backward Citations)
US2461147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |