US2635074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of oxidizable contaminants from alcohols
Assignee: Stanolind Oil and Gas Co
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Filing: 1949-09-24
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Granted: 1953-04-14
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Expires: 1969-09-24
Abstract
No abstract record available.
Inventors
- 👤 Jr Alfred Steitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:18
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A METHOD FOR THE PURIFICATION OF ALCOHOLS PRODUCED BY THE REDUCTION OF CARBON MONOXIDE WITH HYDROGEN, SAID ALCOHOLS BEING NEGATIVE TO THE FUCHSIN ALDEHYDE TEST BUT WHICH CONTAIN IMPURITIES OXIDIZABLE BY OERMANGANATE COMPRISING MIXING WITH THE IMPURE ALCOHOL AT LEAST ABOUT 0.01 WEIGHT PER CENT OF A HYDRAZINE COMPOUND SELECTED FROM THE GROUP CONSISTING OF HYDRAZINE, 2,4-DINITROPHENYLHYDRAZINE, PHENYLHYDRAZINE, AND SEMICARBAZIDE AND THEREAFTER DISTILLING THE RESULTING MIXTURE TO OBTAIN AN ALCOHOL FREE FROM SAID OXIDIZABLE CONTAMINANTS.
Claim 2
Independent Claim
75 words
A METHOD FOR THE PURIFICATION OF ALCOHOLS PRODUCED BY THE REDUCTION OF CARBON MONOXIDE WITH HYDROGEN, SAID ALCOHOLS BEING NEGATIVE TO THE FUCHSIN ALDEHYDE TEST BUT WHICH CONTAIN IMPURITIES OXIDIZABLE BY OERMANGANATE COMPRISING MIXING WITH THE IMPURE ALCOHOL AT LEAST ABOUT 0.01 WEIGHT PER CENT OF A HYDRAZINE COMPOUND SELECTED FROM THE GROUP CONSISTING OF HYDRAZINE, 2,4-DINITROPHENYLHYDRAZINE, PHENYLHYDRAZINE, AND SEMICARBAZIDE AND THEREAFTER DISTILLING THE RESULTING MIXTURE TO OBTAIN AN ALCOHOL FREE FROM SAID OXIDIZABLE CONTAMINANTS.
References Cited (Backward Citations)
US625108A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-13 | 1956-10-13 | 1957-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-13 | 1960-10-13 | 1961-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-13 | 1964-10-13 | 1965-04-14 | $7700.00 | Window Closed / Lapsed |