US2603664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of benzene hexachloride
Assignee: Imperial Chemical Industries Ltd
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Filing: 1947-10-23
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Granted: 1952-07-15
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Expires: 1967-10-23
Abstract
No abstract record available.
Inventors
- 👤 Burrage Leslie James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:13
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/013; C07C17/02; C07C17/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A PROCESS FOR REMOVING DELTA ISOMER FROM BENZENE HEXACHLORINE WHICH COMPRIESE THE STEP OF EXTRACTING WITH A MIXTURE OF WATER AND A LOWER ALIPHATIC ALCOHOL CONTAINING NOT MORE THAN TWO CARBON ATOMS IN THE MOLECULE AND CONTAINING FROM 10 TO 50% BY WEIGHT OF THE WATER.
Claim 2
Dependent Claim
46 words
A PROCESS FOR REMOVING DELTA ISOMER FROM BENZENE HEXACHLORINE WHICH COMPRIESE THE STEP OF EXTRACTING WITH A MIXTURE OF WATER AND A LOWER ALIPHATIC ALCOHOL CONTAINING NOT MORE THAN TWO CARBON ATOMS IN THE MOLECULE AND CONTAINING FROM 10 TO 50% BY WEIGHT OF THE WATER.
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) | 1955-07-15 | 1956-01-14 | 1956-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-15 | 1960-01-14 | 1960-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-15 | 1964-01-14 | 1964-07-15 | $7700.00 | Window Closed / Lapsed |