US2552267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid phase oxidation
Assignee: Monsanto Chemicals Ltd
•
Filing: 1949-03-22
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Granted: 1951-05-08
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Expires: 1969-03-22
Abstract
No abstract record available.
Inventors
- 👤 William S Emerson
- 👤 Robert A Heimsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:25
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/255; C07C51/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
THE CATALYTIC LIQUID PHASE OXIDATION OF DIALKYLBENZENES TO DICARBOXYLIC ACIDS, WHICH COMPRISES CONTACTING A DIALKYLBENZENE HAVING FROM ONE TO FOUR CARBON ATOMS IN THE ALKYL GROUPS, WITH AN OXYGEN CONTAINING GAS IN THE PRESENCE OF AN OXIDATION CATALYST OF THE GROUP CONSISTING OF METAL OXIDES, METAL SALTS, AND MIXTURES THEREOF, AND A COMPOUND HAVING THE STRUCTURAL FORMULA:
Claim 2
Dependent Claim
57 words
THE CATALYTIC LIQUID PHASE OXIDATION OF DIALKYLBENZENES TO DICARBOXYLIC ACIDS, WHICH COMPRISES CONTACTING A DIALKYLBENZENE HAVING FROM ONE TO FOUR CARBON ATOMS IN THE ALKYL GROUPS, WITH AN OXYGEN CONTAINING GAS IN THE PRESENCE OF AN OXIDATION CATALYST OF THE GROUP CONSISTING OF METAL OXIDES, METAL SALTS, AND MIXTURES THEREOF, AND A COMPOUND HAVING THE STRUCTURAL FORMULA:
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) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |