US2848512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of hydrindacenes
Assignee: Universal Oil Products Co
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Filing: 1955-10-10
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Granted: 1958-08-19
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Expires: 1975-10-10
Abstract
No abstract record available.
Inventors
- 👤 Schmerling Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:14
CPC Classifications
C; C11; C11B; C11B5/00; C11B5/0014; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2/70; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/182; C10L1/183; C10L1/1837; C07C2521/00; C07C2521/12; C07C2527/00; C07C2527/02; C07C2527/053; C07C2527/054; C07C2527/06; C07C2527/08; C07C2527/12; C07C2527/1206; C07C2527/14; C07C2527/16; C07C2527/167; C07C2527/173; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/06; C07C2603/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A PROCESS FOR THE PREPARATION OF A SUBSTITUTED POLYNUCLEAR HYDROCARBON WHICH COMPRISES TREATING AN AROMATIC HYDROCARBON CONTAINING AT LEAST TWO PAIRS OF UNSUBSTITUTED ADJACENT CARBON ATOMS SEPARATED BY AT LEAST ONE CARBON ATOM WITH A CONJUGATED DIENE, IN WHICH AT LEAST ONE OF THE DOUBLE BONDED CARBON ATOMS IS A TERTIARY CARBON ATOM, IN THE PRESENCE OF A PROTONIC ACID CATALYST SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID HYDROGEN FLUORIDE, PHOSPHORIC ACID AND SILICAALUMINA, AND RECOVERING THE RESULTANT POLYNUCLEAR HYDROCARBON.
Claim 2
Dependent Claim
81 words
A PROCESS FOR THE PREPARATION OF A SUBSTITUTED POLYNUCLEAR HYDROCARBON WHICH COMPRISES TREATING AN AROMATIC HYDROCARBON CONTAINING AT LEAST TWO PAIRS OF UNSUBSTITUTED ADJACENT CARBON ATOMS SEPARATED BY AT LEAST ONE CARBON ATOM WITH A CONJUGATED DIENE, IN WHICH AT LEAST ONE OF THE DOUBLE BONDED CARBON ATOMS IS A TERTIARY CARBON ATOM, IN THE PRESENCE OF A PROTONIC ACID CATALYST SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID HYDROGEN FLUORIDE, PHOSPHORIC ACID AND SILICAALUMINA, AND RECOVERING THE RESULTANT POLYNUCLEAR 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) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |