US2513099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation of heterocyclic aromatic nitrogen compounds
Assignee: Honeywell International Inc
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Filing: 1947-09-09
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Granted: 1950-06-27
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Expires: 1967-09-09
Abstract
No abstract record available.
Inventors
- 👤 Max B Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:37
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
91 words
IN THE CATALYTIC OXIDATION TO A PYRIDINE CARBOXYLIC ACID OF AN N-HETEROARYL COMPOUND CONTAINING A PYRIDINE NUCLEUS AND CONTAINING AN OXIDIZABLE ORGANIC GROUPING ATTACHED TO THE NITROGEN-CONTAINING AROMATIC NUCLEUS BY AT LEAST ONE CARBON-TO-CARBON LINKAGE, THE IMPROVEMENT WHICH COMPRISES CONDUCTING THE OXIDATION BY REACTING NITRIC ACID WITH A SOLUTION CONTAINING THE N-HETEROARYL COMPOUND AND A RELATIVELY SMALL AMOUNT, DISSOLVED IN SULFURIC ACID, OF A COMPOUND OF AT LEAST ONE OF THE METALS SELECTED FROM THE GROUP CONSISTING OF MERCURY AND COPPER, AND RECOVERING A COMPOUND CONTAINING THE PYRIDINE CARBOXYLIC ACID RADICAL.
Claim 2
Dependent Claim
91 words
IN THE CATALYTIC OXIDATION TO A PYRIDINE CARBOXYLIC ACID OF AN N-HETEROARYL COMPOUND CONTAINING A PYRIDINE NUCLEUS AND CONTAINING AN OXIDIZABLE ORGANIC GROUPING ATTACHED TO THE NITROGEN-CONTAINING AROMATIC NUCLEUS BY AT LEAST ONE CARBON-TO-CARBON LINKAGE, THE IMPROVEMENT WHICH COMPRISES CONDUCTING THE OXIDATION BY REACTING NITRIC ACID WITH A SOLUTION CONTAINING THE N-HETEROARYL COMPOUND AND A RELATIVELY SMALL AMOUNT, DISSOLVED IN SULFURIC ACID, OF A COMPOUND OF AT LEAST ONE OF THE METALS SELECTED FROM THE GROUP CONSISTING OF MERCURY AND COPPER, AND RECOVERING A COMPOUND CONTAINING THE PYRIDINE CARBOXYLIC ACID RADICAL.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-26 | 1953-12-26 | 1954-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-26 | 1957-12-26 | 1958-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-26 | 1961-12-26 | 1962-06-27 | $7700.00 | Window Closed / Lapsed |