US3168571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ketone purification with bisulfite washed ion exchange resins
Assignee: California Research LLC
•
Filing: 1962-01-04
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Granted: 1965-02-02
•
Expires: 1982-01-04
Abstract
No abstract record available.
Inventors
- 👤 Chauncey R Hare
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:59
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/78; C07C45/79
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A METHOD FOR PURIFYING LOWER ALKYL KETONES WHICH HAVE BEEN PREPARED BY THE DECOMPOSITION OF AR(LOWER ALKYL) HYDROPEROXIDES, WHICH COMPRISES CONTACTING SAID KETONES WITH A STRONGLY BASIC ION EXCHANGE RESIN HAVING BISULFITE ANIONS ADSORBED THEREON.
Claim 2
Independent Claim
35 words
A METHOD FOR PURIFYING LOWER ALKYL KETONES WHICH HAVE BEEN PREPARED BY THE DECOMPOSITION OF AR(LOWER ALKYL) HYDROPEROXIDES, WHICH COMPRISES CONTACTING SAID KETONES WITH A STRONGLY BASIC ION EXCHANGE RESIN HAVING BISULFITE ANIONS ADSORBED THEREON.
References Cited (Backward Citations)
US2624699A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-02 | 1968-08-03 | 1969-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-02 | 1972-08-03 | 1973-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-02 | 1976-08-03 | 1977-02-02 | $7700.00 | Window Closed / Lapsed |