Patent US3190904A successfully refreshed from Google Patents.
US3190904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the purification of organic peroxides
Assignee: Imperial Chemical Industries Ltd
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Filing: 1962-01-25
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Granted: 1965-06-22
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Expires: 1982-01-25
Abstract
No abstract record available.
Inventors
- 👤 Spoors James Wheater
- 👤 Woodward Francis Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:17
CPC Classifications
C; C07; C07C; C07C407/00; C07C407/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A PROCESS FOR PURIFYING AN ORGANIC PEROXIDE CONTAINING A NEUTRAL ESTER AS IMPURITY, WHICH COMPRISES WASHING SAID PEROXIDE WITH AN AQUEOUS SOLUTION OF AMMONIA SUFFICIENT TO HYDROLYZE SAID NEUTRAL ESTER WITHOUT AFFECTING SAID PEROXIDE, SAID PEROXIDE BEING SELECTED FROM THE GROUP CONSISTING OF LOWER ALKYL PERESTERS OF SATURATED ALIPHATIC MONOCARBOXYLIC ACIDS AND BENZOIC ACID, AND PEROXIDES HAVING THE FORMULA:
Claim 2
Dependent Claim
59 words
A PROCESS FOR PURIFYING AN ORGANIC PEROXIDE CONTAINING A NEUTRAL ESTER AS IMPURITY, WHICH COMPRISES WASHING SAID PEROXIDE WITH AN AQUEOUS SOLUTION OF AMMONIA SUFFICIENT TO HYDROLYZE SAID NEUTRAL ESTER WITHOUT AFFECTING SAID PEROXIDE, SAID PEROXIDE BEING SELECTED FROM THE GROUP CONSISTING OF LOWER ALKYL PERESTERS OF SATURATED ALIPHATIC MONOCARBOXYLIC ACIDS AND BENZOIC ACID, AND PEROXIDES HAVING THE FORMULA:
References Cited (Backward Citations)
US2567615A
Cited
US3003000A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |