US2661380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidative dehydrogenation of cyclic hydrocarbons
Assignee: ExxonMobil Oil Corp
•
Filing: 1951-02-20
•
Granted: 1953-12-01
•
Expires: 1971-02-20
Abstract
No abstract record available.
Inventors
- 👤 Orkin Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:46
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/42; C07C5/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A METHOD OF OXIDATIVE DEHYDROGENATION OF CARBOXYCLIC HYDROCARBONS WHICH COMPRISES MIXING A FIRST CARBOCYCLIC HYDROCARBON IN WHICH THE NUMBER OF HYDROGEN ATOMS DIRECTLY ATTACHED TO NUCLEAR CARBON ATOMS IS GREATER THAN THE NUMBER OF UNSUBSTITUTED NUCLEAR CARBON ATOMS WITH A GAS CONTAINING FREE OXYGEN, THE AMOUNT OF OXYGEN IN THE RESULTANT MIXTURE BEING AT LEAST ABOUT 100% IN EXCESS OF THE THEORETICAL AMOUNT REQUIRED TO PRODUCE BY OXIDATION A SECOND CARBOCYCLIC HYDROCARBON HAVING FEWER HYDROGEN ATOMS DIRECTLY ATTACHED TO NUCLEAR CARBON ATOMS THAN SAID FIRST CARBOCYCLIC HYDROCARBON, CONTACTING SAID MIXTURE WITH A CATALYST SELECTED FROM THE GROUP CONSISTING OF SILICA GEL, TELLURIUM OXIDE, AND SILICA GEL AND CHROMIA, AT A TEMPERATURE OF ABOUT 550* TO ABOUT 950* F., AND SEPARATING A CARBOCYCLIC HYDROCARBON IN WHICH THE NUMBER OF HYDROGEN ATOMS DIRECTLY ATTACHED TO NUCLEAR CARBON ATOMS IS LESS THAN SAID FIRST CARBOCYCLIC HYDROCARBON.
Claim 2
Independent Claim
143 words
A METHOD OF OXIDATIVE DEHYDROGENATION OF CARBOXYCLIC HYDROCARBONS WHICH COMPRISES MIXING A FIRST CARBOCYCLIC HYDROCARBON IN WHICH THE NUMBER OF HYDROGEN ATOMS DIRECTLY ATTACHED TO NUCLEAR CARBON ATOMS IS GREATER THAN THE NUMBER OF UNSUBSTITUTED NUCLEAR CARBON ATOMS WITH A GAS CONTAINING FREE OXYGEN, THE AMOUNT OF OXYGEN IN THE RESULTANT MIXTURE BEING AT LEAST ABOUT 100% IN EXCESS OF THE THEORETICAL AMOUNT REQUIRED TO PRODUCE BY OXIDATION A SECOND CARBOCYCLIC HYDROCARBON HAVING FEWER HYDROGEN ATOMS DIRECTLY ATTACHED TO NUCLEAR CARBON ATOMS THAN SAID FIRST CARBOCYCLIC HYDROCARBON, CONTACTING SAID MIXTURE WITH A CATALYST SELECTED FROM THE GROUP CONSISTING OF SILICA GEL, TELLURIUM OXIDE, AND SILICA GEL AND CHROMIA, AT A TEMPERATURE OF ABOUT 550* TO ABOUT 950* F., AND SEPARATING A CARBOCYCLIC HYDROCARBON IN WHICH THE NUMBER OF HYDROGEN ATOMS DIRECTLY ATTACHED TO NUCLEAR CARBON ATOMS IS LESS THAN SAID FIRST CARBOCYCLIC HYDROCARBON.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-30 | 1957-06-01 | 1957-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-30 | 1961-06-01 | 1961-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-30 | 1965-06-01 | 1965-12-01 | $7700.00 | Window Closed / Lapsed |