US3012043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation of aromatic hydrocarbons
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1958-06-19
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Granted: 1961-12-05
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Expires: 1978-06-19
Abstract
No abstract record available.
Inventors
- 👤 Dowden Dennis Albert
- 👤 Caldwell Alexander Muirhea Ure
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:39
CPC Classifications
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
141 words
A PROCESS FOR THE OXIDATION OF AROMATIC HYDROCARBONS TO OXYGEN-CONTAINING ORGANIC COMPOUNDS SELECTED FROM THE CLASS CONSISTING OF CARBOXYLIC ACIDS AND ANHYDRIDES, WHICH COMPRISES PASSING AN AROMATIC HYDROCARBON, SELECTED FROM THE CLASS CONSISTING OF MONO- AND DI-CYCLIC AROMATIC HYDROCARBONS, IN THE VAPOR PHASE IN ADMIXTURE WITH A GAS CONTAINING FREE OXYGEN AT AN ELEVATED TEMPERATURE FROM 300* TO 550*C. OVER A FUSED OXIDATION CATALYST CONSISTING ESSENTIALLY OF THE METAL SALT OF A COMPOUND CONSISTING ESSENTIALLY OF VANADIUM PENTOXIDE IN COMBINATION WITH A LOWER VANADIUM OXIDE IN WHICH THE VALENCY OF VANADIUM IS FROM 2 TO 4, WHEREIN SAID METAL IS SELECTED FROM THE CLASS CONSISTING OF THALLIUM, SILVER POTASSIUM, SODIUM, LITHIUM, AND RUBIDIUM, AND WHEREIN THE MOLAR RATIO OF THIS METAL, EXPRESSED AS ITS OXIDE M2O TO VANADIUM OXIDE EXPRESSED AS VANADIUM PENTOXIDE, LIES IN THE RANGE OF 0.007:1 TO 0.05:1.
Claim 2
Dependent Claim
141 words
A PROCESS FOR THE OXIDATION OF AROMATIC HYDROCARBONS TO OXYGEN-CONTAINING ORGANIC COMPOUNDS SELECTED FROM THE CLASS CONSISTING OF CARBOXYLIC ACIDS AND ANHYDRIDES, WHICH COMPRISES PASSING AN AROMATIC HYDROCARBON, SELECTED FROM THE CLASS CONSISTING OF MONO- AND DI-CYCLIC AROMATIC HYDROCARBONS, IN THE VAPOR PHASE IN ADMIXTURE WITH A GAS CONTAINING FREE OXYGEN AT AN ELEVATED TEMPERATURE FROM 300* TO 550*C. OVER A FUSED OXIDATION CATALYST CONSISTING ESSENTIALLY OF THE METAL SALT OF A COMPOUND CONSISTING ESSENTIALLY OF VANADIUM PENTOXIDE IN COMBINATION WITH A LOWER VANADIUM OXIDE IN WHICH THE VALENCY OF VANADIUM IS FROM 2 TO 4, WHEREIN SAID METAL IS SELECTED FROM THE CLASS CONSISTING OF THALLIUM, SILVER POTASSIUM, SODIUM, LITHIUM, AND RUBIDIUM, AND WHEREIN THE MOLAR RATIO OF THIS METAL, EXPRESSED AS ITS OXIDE M2O TO VANADIUM OXIDE EXPRESSED AS VANADIUM PENTOXIDE, LIES IN THE RANGE OF 0.007:1 TO 0.05:1.
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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) | 1964-12-04 | 1965-06-05 | 1965-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-04 | 1969-06-05 | 1969-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-04 | 1973-06-05 | 1973-12-05 | $7700.00 | Window Closed / Lapsed |