Patent US3228977A successfully refreshed from Google Patents.
US3228977A
Expired / Lapsed
US
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Process for the manufacture of saturated aliphatic percarboxylic acids
Assignee: Knapsack AG
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Filing: 1963-02-26
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Granted: 1966-01-11
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Expires: 1983-02-26
Abstract
No abstract record available.
Inventors
- 👤 Sennewald Kurt
- 👤 Born Klaus
- 👤 Rehberg Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:34
CPC Classifications
C; C07; C07C; C07C407/00; C07C407/003; C07C407/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
IN THE PROCESS FOR PREPARING ORGANIC SOLUTIONS OF SATURATED ALIPHATIC PERCARBOXYLIC ACIDS BY OXIDIZING A SOLUTION OF A CORRESPONDING ALDEHYDE IN AN INERT SOLVENT WITH AT LEAST THE MOLAR PROPORTION OF GASEOUS OXYGEN IN THE PRESENCE OF A HEAVY METAL CATALYST AT TEMPERATURES WITHIN THE RANGE OF BETWEEN ABOUT 0*C. AND ABOUT 50*C., THE IMPROVEMENT OF OXIDIZING THE ALDEHYDE DISSOLVED IN AT LEAST ONE INERT SOLVENT SELECTED FROM THE GROUP CONSISTING OF ESTER, KETONES AND HYDROCARBONS WITH GASEOUS OXYGEN IN THE PRESENCE OF A PERACID CORRESPONDING TO THE ALDEHYDE REACTANT IN A PROPORTION OF AT MOST ABOUT 1% BY WEIGHT CALCULATED ON THE ALDEHYDE USED, THE PERACID BEING ADDED BEFORE THE ALDEHYDE IS OXIDIZED WITH THE OXYGEN.
Claim 2
Dependent Claim
117 words
IN THE PROCESS FOR PREPARING ORGANIC SOLUTIONS OF SATURATED ALIPHATIC PERCARBOXYLIC ACIDS BY OXIDIZING A SOLUTION OF A CORRESPONDING ALDEHYDE IN AN INERT SOLVENT WITH AT LEAST THE MOLAR PROPORTION OF GASEOUS OXYGEN IN THE PRESENCE OF A HEAVY METAL CATALYST AT TEMPERATURES WITHIN THE RANGE OF BETWEEN ABOUT 0*C. AND ABOUT 50*C., THE IMPROVEMENT OF OXIDIZING THE ALDEHYDE DISSOLVED IN AT LEAST ONE INERT SOLVENT SELECTED FROM THE GROUP CONSISTING OF ESTER, KETONES AND HYDROCARBONS WITH GASEOUS OXYGEN IN THE PRESENCE OF A PERACID CORRESPONDING TO THE ALDEHYDE REACTANT IN A PROPORTION OF AT MOST ABOUT 1% BY WEIGHT CALCULATED ON THE ALDEHYDE USED, THE PERACID BEING ADDED BEFORE THE ALDEHYDE IS OXIDIZED WITH THE OXYGEN.
References Cited (Backward Citations)
USRE25057E
Cited
US2347434A
Cited
US2590856A
Cited
US2877266A
Cited
GB864803A
Cited
SU117580A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |