US2526896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of diaryl alkanes
Assignee: Universal Oil Products Co
•
Filing: 1947-11-28
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Granted: 1950-10-24
•
Expires: 1967-11-28
Abstract
No abstract record available.
Inventors
- 👤 Vladimir N Ipatieff
- 👤 Pines Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:59
CPC Classifications
C; C07; C07C; C07C15/00; C07C15/12; C07C15/16; C07C2/00; C07C2/76; C07C2527/00; C07C2527/02; C07C2527/053; C07C2527/054; C07C2527/06; C07C2527/08; C07C2527/12; C07C2527/1206
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A PROCESS FOR PRODUCING AN UNSYMMETICAL DIARYLALKANE HYDROCARBON WHICH COMPRISES REACTING AT HYDROGEN TRANSFER CONDITIONS IN THE PRESENCE OF AN ACID-ACTING CATALYST A BRANCHED CHAIN OLEFIN-ACTING COMPOUND AND AN AROMATIC HYDROCARBON HAVING A REPLACEABLE NUCLEAR HYDROGEN ATOM AND TWO HYDROCARBON RADICAL SUBSTITUENTS IN PARA POSITION TO EACH OTHER AND IN WHICH AT LEAST ONE OF SAID RADICAL SUBSTITUENTS HAS ONLY TWO HYDROGEN ATOMS COMBINED WITH THE CARBON ATOM THAT IS JOINED TO THE AROMATIC RING.
Claim 2
Dependent Claim
75 words
A PROCESS FOR PRODUCING AN UNSYMMETICAL DIARYLALKANE HYDROCARBON WHICH COMPRISES REACTING AT HYDROGEN TRANSFER CONDITIONS IN THE PRESENCE OF AN ACID-ACTING CATALYST A BRANCHED CHAIN OLEFIN-ACTING COMPOUND AND AN AROMATIC HYDROCARBON HAVING A REPLACEABLE NUCLEAR HYDROGEN ATOM AND TWO HYDROCARBON RADICAL SUBSTITUENTS IN PARA POSITION TO EACH OTHER AND IN WHICH AT LEAST ONE OF SAID RADICAL SUBSTITUENTS HAS ONLY TWO HYDROGEN ATOMS COMBINED WITH THE CARBON ATOM THAT IS JOINED TO THE AROMATIC RING.
References Cited (Backward Citations)
US1939932A
Cited
US2246762A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-23 | 1954-04-24 | 1954-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-23 | 1958-04-24 | 1958-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-23 | 1962-04-24 | 1962-10-24 | $7700.00 | Window Closed / Lapsed |