US2833778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparation of carboxyl derivatives of certain n-heterocyclics by oxidation
Assignee: Mid Century Corp
•
Filing: 1955-03-22
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Granted: 1958-05-06
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Expires: 1975-03-22
Abstract
No abstract record available.
Inventors
- 👤 Saffer Alfred
- 👤 Robert S Barker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:17
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/78; C07D213/79; C07D213/803; C07D215/00; C07D215/02; C07D215/16; C07D215/48; C07D217/00; C07D217/22; C07D217/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A PROCESS FOR PRODUCING HETEROAROMATIC CARBOXYLIC ACIDS WHICH COMPRISES OXIDIZING A SUBSTITUTED HETEROAROMATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKYL-SUBSTITUTED AND PARTIALLY OXISIZED ALKYL-SUBSTITUTED PYRIDINE, QUINOLINE, ISOQUINOLINE AND ARIDINE IN THE LIQUID PHASE WITH MOLECULAR OXYGEN IN THE PRESENCE OF CATALYTIC AMOUNTS OF HEAVY METAL AND BROMINE CTALYSTS AND RECOVERING SAID HETEROAROMATIC CARBOXYLIC ACID.
Claim 2
Dependent Claim
55 words
A PROCESS FOR PRODUCING HETEROAROMATIC CARBOXYLIC ACIDS WHICH COMPRISES OXIDIZING A SUBSTITUTED HETEROAROMATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKYL-SUBSTITUTED AND PARTIALLY OXISIZED ALKYL-SUBSTITUTED PYRIDINE, QUINOLINE, ISOQUINOLINE AND ARIDINE IN THE LIQUID PHASE WITH MOLECULAR OXYGEN IN THE PRESENCE OF CATALYTIC AMOUNTS OF HEAVY METAL AND BROMINE CTALYSTS AND RECOVERING SAID HETEROAROMATIC CARBOXYLIC ACID.
References Cited (Backward Citations)
US2245528A
Cited
GB563274A
Cited
US2476004A
Cited
US2415800A
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US2515593A
Cited
US2552267A
Cited
FR1017881A
Cited
US2723994A
Cited
US2712549A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |