Patent US2946800A successfully refreshed from Google Patents.
US2946800A
Expired / Lapsed
US
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Process for the preparation of isonicotinic acid
Assignee: Standard Oil Co
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Filing: 1957-06-05
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Granted: 1960-07-26
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Expires: 1977-06-05
Abstract
No abstract record available.
Inventors
- 👤 Ellis K Fields
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:49
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/78; C07D213/79; C07D213/803
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A PROCESS OF PREPARING ISONICOTINIC ACID FROM A METHYLOLATED DERIVATIVE OF GAMMA PICOLINE HAVING AT LEAST ONE METHYLOL GROUP ATTACHED TO THE CARBON ATOM OF THE GAMMA METHYL GROUP WHICH COMPRISES OXIDIZING SAID METHYLOLATED DERIVATIVE IN THE LIQUID PHASE WITH MOLECULAR OXYGEN IN THE PRESENCE OF A SOLVENT COMPRISING A MONOCARBOXYLIC ACID HAVING FROM 2 TO 8 CARBON ATOMS IN THE MOLECULE AND IN THE PRESENCE OF FROM ABOUT 0.001% TO ABOUT 5% BY WEIGHT OF A METALLIC OXIDATION CATALYST COMPRISING ESSENTIALLY AS THE SOLE EFFECTIVE CATALYTIC INGREDIENT THEREOF A HEAVY METAL SALT OF A CARBOXYLIC ACID AT A TEMPERATURE OF FROM ABOUT 350*F. TO ABOUT 425*F. AND AT A PRESSURE AT LEAST SUFFICIENT TO MAINTAIN LIQUID PHASE REACTION CONDITIONS.
Claim 2
Dependent Claim
120 words
A PROCESS OF PREPARING ISONICOTINIC ACID FROM A METHYLOLATED DERIVATIVE OF GAMMA PICOLINE HAVING AT LEAST ONE METHYLOL GROUP ATTACHED TO THE CARBON ATOM OF THE GAMMA METHYL GROUP WHICH COMPRISES OXIDIZING SAID METHYLOLATED DERIVATIVE IN THE LIQUID PHASE WITH MOLECULAR OXYGEN IN THE PRESENCE OF A SOLVENT COMPRISING A MONOCARBOXYLIC ACID HAVING FROM 2 TO 8 CARBON ATOMS IN THE MOLECULE AND IN THE PRESENCE OF FROM ABOUT 0.001% TO ABOUT 5% BY WEIGHT OF A METALLIC OXIDATION CATALYST COMPRISING ESSENTIALLY AS THE SOLE EFFECTIVE CATALYTIC INGREDIENT THEREOF A HEAVY METAL SALT OF A CARBOXYLIC ACID AT A TEMPERATURE OF FROM ABOUT 350*F. TO ABOUT 425*F. AND AT A PRESSURE AT LEAST SUFFICIENT TO MAINTAIN LIQUID PHASE REACTION CONDITIONS.
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) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |