US3306944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the hydrodealkylation of alkyl aromatic hydrocarbons
Assignee: Universal Oil Products Co
•
Filing: 1965-12-27
•
Granted: 1967-02-28
•
Expires: 1985-12-27
Abstract
No abstract record available.
Inventors
- 👤 Ernest L Pollitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:08
CPC Classifications
C; C07; C07C; C07C4/00; C07C4/08; C07C4/12; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/02; C07C2523/04; C07C2523/38; C07C2523/40; C07C2523/46; C07C2523/54; C07C2523/56; C07C2523/58; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A PROCESS FOR THE DEMETHYLATION OF AN ALKYL-SUBSTITUTED AROMATIC COMPOUND HAVING AN ALKYL SIDE-CHAIN OF AT LEAST 2 CARBON ATOMS WHICH COMPRISES TREATIGN SAID COMPOUND WITH HYDROGEN IN THE PRESENCE OF RHODIUM COMPOSITED ON AN ALKALI METAL PROMOTED METAL OXIDE SUPPORT AT DEALKYLATION CONDITIONS EFFECTIVE FOR THE DEMETHYLATION OF SAID ALKYL SIDE-CHAIN AND RECOVERING THE RESULTANT DEALKYLATED COMPOUNDS INCLUDING AN ALKYL AROMATIC HAVING A SMALLER ALKYL GROUP THAN SAID SIDE-CHAIN.
Claim 2
Dependent Claim
70 words
A PROCESS FOR THE DEMETHYLATION OF AN ALKYL-SUBSTITUTED AROMATIC COMPOUND HAVING AN ALKYL SIDE-CHAIN OF AT LEAST 2 CARBON ATOMS WHICH COMPRISES TREATIGN SAID COMPOUND WITH HYDROGEN IN THE PRESENCE OF RHODIUM COMPOSITED ON AN ALKALI METAL PROMOTED METAL OXIDE SUPPORT AT DEALKYLATION CONDITIONS EFFECTIVE FOR THE DEMETHYLATION OF SAID ALKYL SIDE-CHAIN AND RECOVERING THE RESULTANT DEALKYLATED COMPOUNDS INCLUDING AN ALKYL AROMATIC HAVING A SMALLER ALKYL GROUP THAN SAID SIDE-CHAIN.
References Cited (Backward Citations)
US3204006A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |