Patent US2825069A successfully refreshed from Google Patents.
Patent US3306915A successfully refreshed from Google Patents.
US3306915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation of aromatic compounds
Assignee: Sinclair Research Inc
•
Filing: 1963-04-03
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Granted: 1967-02-28
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Expires: 1983-04-03
Abstract
No abstract record available.
Inventors
- 👤 Vrbaski Theodore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:17
CPC Classifications
B; B01; B01J; B01J21/00; B01J23/00; B01J23/16; B01J23/20; B01J23/22; C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/255; C07C51/265; C07C51/31; C07C51/313
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A PROCESS FOR THE CATALYTIC VAPOR PHASE OXIDATION OF AN ORTHO-(DI-LOWER ALKYL) BENZENE TO THE CORRESPONDING ANHYDRIDE WHICH COMPRISES REACTING SAID ORTHO(DILOWER ALKYL) BENZENE IN THE VAPOR PHASE AT A TEMPERATURE FROM ABOUT 300 TO 600* C. WITH MOLECULAR OXYGEN IN THE PRESENCE OF A FUSED VNADIUM PENTOXIDE OXIDATION CATALYST, SAID CATALYST BEING PROVIDED WITH PROMOTIONAL AMOUNTS OF ZIRCONIUM OXIDE AND A LANTHANIDE SERIES METAL OXIDE.
Claim 2
Dependent Claim
66 words
A PROCESS FOR THE CATALYTIC VAPOR PHASE OXIDATION OF AN ORTHO-(DI-LOWER ALKYL) BENZENE TO THE CORRESPONDING ANHYDRIDE WHICH COMPRISES REACTING SAID ORTHO(DILOWER ALKYL) BENZENE IN THE VAPOR PHASE AT A TEMPERATURE FROM ABOUT 300 TO 600* C. WITH MOLECULAR OXYGEN IN THE PRESENCE OF A FUSED VNADIUM PENTOXIDE OXIDATION CATALYST, SAID CATALYST BEING PROVIDED WITH PROMOTIONAL AMOUNTS OF ZIRCONIUM OXIDE AND A LANTHANIDE SERIES METAL OXIDE.
References Cited (Backward Citations)
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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 |