US2563826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing 3, 5-dimethyl 1-ethyl benzene
Assignee: California Research LLC
•
Filing: 1947-11-12
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Granted: 1951-08-14
•
Expires: 1967-11-12
Abstract
No abstract record available.
Inventors
- 👤 William E Elwell
- 👤 Albert J Castro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:40
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2/68; C07C2527/00; C07C2527/06; C07C2527/125; C07C2527/126
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A PROCESS FOR PRODUCING 3,5-DIMETHYL 1EHTYL BENZENE CONTAINING LESS THAN 5% BY VOLUME OF 2,5-DIMETHYL 1-ETHYL BENZENE BASED ON THE 2.5-DIMETHYL 1-ETHYL BENZENE WHICH COMPRISES INTIMATELY CONTACTING ETHYLENE WITH A MOLAR EXCESS, BASED ON THE ETHYLENE, OF ESSENTIALLY PURE METAL XYLENE IN A REACTION ZONE IN THE PRESENCE OF ALUMINUM CHLORIDE IN AMOUNT NOT EXCEEDING ABOUT 2 MOL PER CENT BASED ON THE XYLENE AND AT A TEMPERATURE IN THE RANGE OF 45* C. TO 95* C. FOR A PERIOD IN THE RANGE 0.5 TO 18 HOURS, THE TIME BEING OF LONGER DURATION AT LOWER TEMPERATURES AND OF SHORTER DURATION AT HIGHER TEMPERATURES WITHIN SAID TEMPERATURE RANGE.
Claim 2
Dependent Claim
107 words
A PROCESS FOR PRODUCING 3,5-DIMETHYL 1EHTYL BENZENE CONTAINING LESS THAN 5% BY VOLUME OF 2,5-DIMETHYL 1-ETHYL BENZENE BASED ON THE 2.5-DIMETHYL 1-ETHYL BENZENE WHICH COMPRISES INTIMATELY CONTACTING ETHYLENE WITH A MOLAR EXCESS, BASED ON THE ETHYLENE, OF ESSENTIALLY PURE METAL XYLENE IN A REACTION ZONE IN THE PRESENCE OF ALUMINUM CHLORIDE IN AMOUNT NOT EXCEEDING ABOUT 2 MOL PER CENT BASED ON THE XYLENE AND AT A TEMPERATURE IN THE RANGE OF 45* C. TO 95* C. FOR A PERIOD IN THE RANGE 0.5 TO 18 HOURS, THE TIME BEING OF LONGER DURATION AT LOWER TEMPERATURES AND OF SHORTER DURATION AT HIGHER TEMPERATURES WITHIN SAID TEMPERATURE RANGE.
References Cited (Backward Citations)
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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) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |