US2773108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylation process
Assignee: Standard Oil Co
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Filing: 1954-10-29
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Granted: 1956-12-04
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Expires: 1974-10-29
Abstract
No abstract record available.
Inventors
- 👤 Edwin F Peters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:59
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2521/00; C07C2521/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A PROCESS FOR THE ETHYLATION OF AN AROMATIC HYDROCARBON, WHICH PROCESS COMPRISES CONTACTING SAID AROMATIC HYDROCARBONS WITH ETHYLENE AT A TEMPERATURE BETWEEN ABOUT 100* F. AND ABOUT 350* F. IN THE PRESENCE OF AN ACIDIC CATALYST CONSISTING ESSENTIALLY OF A MAJOR PROPORTION BY WEIGHT OF SILICA AND A MINOR PROPORTION BY WEIGHT OF ALUMINA, WHICH CATALYST HAS BEEN ACTIVATED BEFORE USE IN SAID EHTYLATION BY TREATMENT WITH HYDROGEN UNDER A PRESSURE OF AT LEAST ABOUT 20 P.S.I. AT A TEMPERATURE BETWEEN ABOUT 400* F. AND ABOUT 1000* F. FOR A PERIOD OF TIME SUFFICIENT TO EFFECT SUBSTANTIAL ACTIVATION OF SAID CATALYST FOR SAID ETHYLATION OF AN AROMATIC HYDROCARBON.
Claim 2
Dependent Claim
108 words
A PROCESS FOR THE ETHYLATION OF AN AROMATIC HYDROCARBON, WHICH PROCESS COMPRISES CONTACTING SAID AROMATIC HYDROCARBONS WITH ETHYLENE AT A TEMPERATURE BETWEEN ABOUT 100* F. AND ABOUT 350* F. IN THE PRESENCE OF AN ACIDIC CATALYST CONSISTING ESSENTIALLY OF A MAJOR PROPORTION BY WEIGHT OF SILICA AND A MINOR PROPORTION BY WEIGHT OF ALUMINA, WHICH CATALYST HAS BEEN ACTIVATED BEFORE USE IN SAID EHTYLATION BY TREATMENT WITH HYDROGEN UNDER A PRESSURE OF AT LEAST ABOUT 20 P.S.I. AT A TEMPERATURE BETWEEN ABOUT 400* F. AND ABOUT 1000* F. FOR A PERIOD OF TIME SUFFICIENT TO EFFECT SUBSTANTIAL ACTIVATION OF SAID CATALYST FOR SAID ETHYLATION OF AN AROMATIC HYDROCARBON.
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) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |