US2839575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation of alkyl-substituted benzene carboxylic acids
Assignee: Shell Development Co
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Filing: 1954-05-27
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Granted: 1958-06-17
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Expires: 1974-05-27
Abstract
No abstract record available.
Inventors
- 👤 Lloyd C Fetterly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:40
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/04; C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/255; C07C51/265; C07C51/27; C07C51/275; B01J2231/00; B01J2231/70; B01J2531/00; B01J2531/80; B01J2531/84; B01J2531/845
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A PROCESS FOR THE PRODUCTION OF BENZENE DICARBOXYLIC ACIDS WHICH COMPRISES INTIMATELY CONTACTING IN SUBSTANTIALLY ANHYDROUS LIQUID PHASE AT A TEMPERATURE OF FROM ABOUT 100*C. TO ABOUT 250*C., A MOLECULAR OXYGENCONTAINING GAS AND A MIXTURE COMPRISING AN ALKYL-SUBSTITUTED BENZENE MONOCARBOXYLIC ACID AND FROM ABOUT 0.01% TO ABOUT 2% BY WEIGHT OF SAID BENZENE MONOCARBOXYLIC ACID OF AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF NITROGEN DIOXIDE, NITROHYDROCARBONS AND HYDROCARBYL NITRITES WHICH IONIZE TO GIVE -ONO AND -NO2 IONS.
Claim 2
Dependent Claim
79 words
A PROCESS FOR THE PRODUCTION OF BENZENE DICARBOXYLIC ACIDS WHICH COMPRISES INTIMATELY CONTACTING IN SUBSTANTIALLY ANHYDROUS LIQUID PHASE AT A TEMPERATURE OF FROM ABOUT 100*C. TO ABOUT 250*C., A MOLECULAR OXYGENCONTAINING GAS AND A MIXTURE COMPRISING AN ALKYL-SUBSTITUTED BENZENE MONOCARBOXYLIC ACID AND FROM ABOUT 0.01% TO ABOUT 2% BY WEIGHT OF SAID BENZENE MONOCARBOXYLIC ACID OF AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF NITROGEN DIOXIDE, NITROHYDROCARBONS AND HYDROCARBYL NITRITES WHICH IONIZE TO GIVE -ONO AND -NO2 IONS.
References Cited (Backward Citations)
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Cited
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US2653165A
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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) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |