Patent US3320322A successfully refreshed from Google Patents.
US3320322A
Expired / Lapsed
US
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Purification process
Assignee: Wyandotte Chemicals Corp
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Filing: 1963-08-02
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Granted: 1967-05-16
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Expires: 1983-08-02
Abstract
No abstract record available.
Inventors
- 👤 William K Langdon
- 👤 Kokorudz Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:21
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/61; C07C45/63; C07C45/78; C07C45/85
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A PROCESS FOR THE SIMULTANEOUS PRODUCTION AND PURIFICATION OF A 1,1,1-TRIHALO-2-KETONE CONTAINED IN A CRUDE HALOGENATION MIXTURE COMPRISING A 1-HALO-2-KETONE AND A 1,3-POLYHALOACETONE WHICH COMPRISES REACTING SAID MIXTURE WITH A HYPHALITE IN AQUEOUS MEDIUM, THE HALOGEN OF SAID HYPOHALITE HAVING AN ATOMIC WEIGHT OF AT LEAST 35, WHILE MAINTAINING THE PH IN THE RANGE OF ABOUT 6 TO ABOUT 10 AND SEPARATING THE 1,1,1-TRIHALO-2-KETONE FROM THE RESULTING MIXTURE.
Claim 2
Dependent Claim
68 words
A PROCESS FOR THE SIMULTANEOUS PRODUCTION AND PURIFICATION OF A 1,1,1-TRIHALO-2-KETONE CONTAINED IN A CRUDE HALOGENATION MIXTURE COMPRISING A 1-HALO-2-KETONE AND A 1,3-POLYHALOACETONE WHICH COMPRISES REACTING SAID MIXTURE WITH A HYPHALITE IN AQUEOUS MEDIUM, THE HALOGEN OF SAID HYPOHALITE HAVING AN ATOMIC WEIGHT OF AT LEAST 35, WHILE MAINTAINING THE PH IN THE RANGE OF ABOUT 6 TO ABOUT 10 AND SEPARATING THE 1,1,1-TRIHALO-2-KETONE FROM THE RESULTING MIXTURE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-15 | 1970-11-14 | 1971-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-15 | 1974-11-14 | 1975-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-15 | 1978-11-14 | 1979-05-16 | $7700.00 | Window Closed / Lapsed |