US2768982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fused ring hydrocarbon production
Assignee: California Research LLC
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Filing: 1953-12-21
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Granted: 1956-10-30
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Expires: 1973-12-21
Abstract
No abstract record available.
Inventors
- 👤 Maurice J Schlatter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:16
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/76; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12; C07C2527/1206; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/06; C07C2603/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
69 words
THE PROCESS FOR PREPARING S-HYDRINDACENES WHICH COMPRISES EFFECTING A HYDROGEN TRANSFER REACTION IN THE PRESENCE OF AN ACID-ACTING CATALYST AT A TEMPERATURE BETWEEN ABOUT -30* C. TO ABOUT 150* C. AND AT A PRESSURE FROM ATMOSPHERIC UP TO ABOUT 50 ATMOSPHERES BETWEEN AN ALKYL BENZENE HAVING TWO SECONDARY ALKYL GROUPS IN PARA POSITION AND AT LEAST TWO MOLES OF A BRANCHED-CHAIN OLEFIN FOR EACH MOLE OF THE ALKYL BENZENE.
References Cited (Backward Citations)
US2514546A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-30 | 1960-04-30 | 1960-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-30 | 1964-04-30 | 1964-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-30 | 1968-04-30 | 1968-10-30 | $7700.00 | Window Closed / Lapsed |