US3231620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of carbonyl compounds
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1961-06-23
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Granted: 1966-01-25
•
Expires: 1981-06-23
Abstract
No abstract record available.
Inventors
- 👤 Cotterill Colin Bertie
- 👤 Dean Fred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:57
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/27; C07C45/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A PROCESS FOR THE DIRECT OXIDATION OF PROPYLENE TO ACETONE WHICH COMPRISES THE STEP OF CONTACTING THE PROPYLENE WITH HYDROGEN PEROXIDE AT A TEMPERATURE WHICH IS AT MOST 100*C. IN THE PRESENCE OF A REACTION MEDIUM CONSISTING ESSENTIALLY OF PALLADOUS CHLORIDE AND AN AQUEOUS MINERAL ACID, THE ACIDITY OF THE REACTION MIXTURE BEING AT LEAST 0.02 N.
Claim 2
Dependent Claim
57 words
A PROCESS FOR THE DIRECT OXIDATION OF PROPYLENE TO ACETONE WHICH COMPRISES THE STEP OF CONTACTING THE PROPYLENE WITH HYDROGEN PEROXIDE AT A TEMPERATURE WHICH IS AT MOST 100*C. IN THE PRESENCE OF A REACTION MEDIUM CONSISTING ESSENTIALLY OF PALLADOUS CHLORIDE AND AN AQUEOUS MINERAL ACID, THE ACIDITY OF THE REACTION MIXTURE BEING AT LEAST 0.02 N.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |