US2823240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylation of alkyl aromatic hydrocarbons to produce indanes
Assignee: Standard Oil Co
•
Filing: 1952-09-26
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Granted: 1958-02-11
•
Expires: 1972-09-26
Abstract
No abstract record available.
Inventors
- 👤 Field Edmund
- 👤 Feller Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:34
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/72; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14; C07C2602/00; C07C2602/02; C07C2602/04; C07C2602/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A PROCESS FOR THE ALKYLATION OF AN ALKYLAROMATIC HYDROCARBON HAVING AT LEAST ONE ALLYLIC HYDROGEN ATOM, WHICH PROCESS COMPRISES CONTACTING A SUBSTANTIAL MOLAR EXCESS OF SAID ALKYLAROMATIC HYDROCARBON, BASED ON ETHYLENE, WITH ETHYLENE IN THE PRESENCE OF AN ALKALI METAL HYDRIDE AND AN ALKALI METAL ALUMINUM HYDRIDE AT A TEMPERATURE BETWEEN ABOUT 160*C. AND ABOUT 350*C. AND A PRESSURE OF AT LEAST ABOUT 200 P. S. I. G., AND RECOVERING AN ALKYLATION PRODUCT COMPRISING AN INDANE HYDROCARBON THUS PRODUCED.
Claim 2
Dependent Claim
79 words
A PROCESS FOR THE ALKYLATION OF AN ALKYLAROMATIC HYDROCARBON HAVING AT LEAST ONE ALLYLIC HYDROGEN ATOM, WHICH PROCESS COMPRISES CONTACTING A SUBSTANTIAL MOLAR EXCESS OF SAID ALKYLAROMATIC HYDROCARBON, BASED ON ETHYLENE, WITH ETHYLENE IN THE PRESENCE OF AN ALKALI METAL HYDRIDE AND AN ALKALI METAL ALUMINUM HYDRIDE AT A TEMPERATURE BETWEEN ABOUT 160*C. AND ABOUT 350*C. AND A PRESSURE OF AT LEAST ABOUT 200 P. S. I. G., AND RECOVERING AN ALKYLATION PRODUCT COMPRISING AN INDANE HYDROCARBON THUS PRODUCED.
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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) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |