US2739991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of benzene
Assignee: Universal Oil Products Co
•
Filing: 1952-07-30
•
Granted: 1956-03-27
•
Expires: 1972-07-30
Abstract
No abstract record available.
Inventors
- 👤 George L Hervert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:55
CPC Classifications
C; C07; C07C; C07C6/00; C07C6/08; C07C6/12; C07C6/126
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
A PROCESS FOR CONVERTING TOLUENE INTO BENZENE WHICH COMPRISES REACTING TOLUENE WITH AN ALKYLATABLE AROMATIC COMPOUND OTHER THAN TOLUENE AT METHYL TRANSFER REACTION CONDITIONS IN THE PRESENCE OF AN ACID-ACTING CATALYST.
Claim 2
Dependent Claim
31 words
A PROCESS FOR CONVERTING TOLUENE INTO BENZENE WHICH COMPRISES REACTING TOLUENE WITH AN ALKYLATABLE AROMATIC COMPOUND OTHER THAN TOLUENE AT METHYL TRANSFER REACTION CONDITIONS IN THE PRESENCE OF AN ACID-ACTING CATALYST.
References Cited (Backward Citations)
US2222632A
Cited
US2335596A
Cited
US2418689A
Cited
US2403748A
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US2528893A
Cited
US2692293A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-27 | 1959-09-26 | 1960-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-27 | 1963-09-26 | 1964-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-27 | 1967-09-26 | 1968-03-27 | $7700.00 | Window Closed / Lapsed |