US2744928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation of unsaturated aldehydes to acids
Assignee: Shell Development Co
•
Filing: 1952-11-28
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Granted: 1956-05-08
•
Expires: 1972-11-28
Abstract
No abstract record available.
Inventors
- 👤 Curtis W Smith
- 👤 Roy T Holm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:05
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/285
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A PROCESS OF PREPARING AN ALPHA BETA-UNSATURATED ALIPHATIC CARBOXYLIC ACID WHICH COMPRISES TREATING A SOLUTION OF THE CORRESPONDING ALPHA, BETA-UNSATURATED ALIPHATIC ALDEHYDE IN A MUTUAL SOLVENT FOR THE ALDEHYDE AND THE ACID WITH FROM ABOUT 0.5 TO ABOUT 1 EQUIVALENT PER EQUIVALENT OF ALDEHYDE OF HYDROGEN PEROXIDE AS THE SOLE EFFECTIVE ADDED OXIDIZING AGENT IN THE PRESENCE OF A HETEROPOLYACID OF AT LEAST ONE ACID-FORMING ELEMENT OF GROUP VI OF THE PERIODIC TABLE, IN A REACTION ENVIRONMENT THE WATER CONTENT OF WHICH IS REGULATED SO THAT THE AMOUNT OF WATER IN THE REACTED MIXTURE DOES NOT EXCEED ABOUT 30% BY WEIGHT AND AT A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 10* C. TO ABOUT 100* C.
Claim 2
Dependent Claim
117 words
A PROCESS OF PREPARING AN ALPHA BETA-UNSATURATED ALIPHATIC CARBOXYLIC ACID WHICH COMPRISES TREATING A SOLUTION OF THE CORRESPONDING ALPHA, BETA-UNSATURATED ALIPHATIC ALDEHYDE IN A MUTUAL SOLVENT FOR THE ALDEHYDE AND THE ACID WITH FROM ABOUT 0.5 TO ABOUT 1 EQUIVALENT PER EQUIVALENT OF ALDEHYDE OF HYDROGEN PEROXIDE AS THE SOLE EFFECTIVE ADDED OXIDIZING AGENT IN THE PRESENCE OF A HETEROPOLYACID OF AT LEAST ONE ACID-FORMING ELEMENT OF GROUP VI OF THE PERIODIC TABLE, IN A REACTION ENVIRONMENT THE WATER CONTENT OF WHICH IS REGULATED SO THAT THE AMOUNT OF WATER IN THE REACTED MIXTURE DOES NOT EXCEED ABOUT 30% BY WEIGHT AND AT A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 10* C. TO ABOUT 100* C.
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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) | 1959-05-08 | 1959-11-07 | 1960-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-08 | 1963-11-07 | 1964-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-08 | 1967-11-07 | 1968-05-08 | $7700.00 | Window Closed / Lapsed |