US2606868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photochemical preparation of the delta isomer of benzene hexachloride
Assignee: Dow Chemical Co
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Filing: 1951-05-31
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Granted: 1952-08-12
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Expires: 1971-05-31
Abstract
No abstract record available.
Inventors
- 👤 Francis N Alquist
- 👤 Kenneth C Kauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:29
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/013; C07C17/02; Y; Y10; Y10S; Y10S204/00; Y10S204/902; Y10S204/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
THE METHOD WHICH CONSISTS ESSENTIALLY IN THE PHOTO-CHLORINATION OF BENZENE AT A TEMPERATURE OF BETWEEN 0* C. AND -30* C. WHILE THE BENZENE IS DISSOLVED IN A SOLVENT SELECTED FROM THE GROUP CONSISTING OF CHLORINATED METHANES AND LIQUID CHLORINATED ETHANES IN A RATIO TO PROVIDE FROM 10 TO 96 PER CENT OF THE CHLORINATED SOLVENT AND CORRESPONDINLY 90 TO 4 PER CENT BENZENE, IN THE PRESENCE OF CATALYTIC AMOUNTS OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF BENZOTHIAZOLE AND MERCAPTOBENZOTHIAZOLE, AND RECOVERING FROM THE REACTION MEDIUM AN ISOMERIC MIXTURE OF BENZENE HEXACHLORIDES CONTAINING OVER 17 PER CENT OF THE DELTA ISOMER.
Claim 2
Independent Claim
102 words
THE METHOD WHICH CONSISTS ESSENTIALLY IN THE PHOTO-CHLORINATION OF BENZENE AT A TEMPERATURE OF BETWEEN 0* C. AND -30* C. WHILE THE BENZENE IS DISSOLVED IN A SOLVENT SELECTED FROM THE GROUP CONSISTING OF CHLORINATED METHANES AND LIQUID CHLORINATED ETHANES IN A RATIO TO PROVIDE FROM 10 TO 96 PER CENT OF THE CHLORINATED SOLVENT AND CORRESPONDINLY 90 TO 4 PER CENT BENZENE, IN THE PRESENCE OF CATALYTIC AMOUNTS OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF BENZOTHIAZOLE AND MERCAPTOBENZOTHIAZOLE, AND RECOVERING FROM THE REACTION MEDIUM AN ISOMERIC MIXTURE OF BENZENE HEXACHLORIDES CONTAINING OVER 17 PER CENT OF THE DELTA ISOMER.
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) | 1955-08-12 | 1956-02-11 | 1956-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-12 | 1960-02-11 | 1960-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-12 | 1964-02-11 | 1964-08-12 | $7700.00 | Window Closed / Lapsed |