US2569441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic conversion of polychlorocyclohexanes to polychlorobenzene
Assignee: Dow Chemical Co
•
Filing: 1949-03-14
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Granted: 1951-10-02
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Expires: 1969-03-14
Abstract
No abstract record available.
Inventors
- 👤 Francis N Alquist
- 👤 Joseph L Wasco
- 👤 Kenneth C Kauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:38
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
THE METHOD WHICH CONSISTS ESSENTIALLY IN HEATING A COMPOUND FROM THE GROUP CONSISTING OF BENZENE HEXACHLORIDE, MONOCHLOROBENZENE HEXACHLORIDE AND DICHLOROBENZENE HEXACHLORIDE WITH FROM 0.5 TO 5 PER CENT OF ITS WEIGHT OF ANHYDROUS ALUMINUM CHLORIDE AT A TEMPERATURE ABOVE 90* C. AT WHICH HYDROGEN CHLORIDE IS LIBERTED, UNTIL ABOUT 3 MOLES OF HYDROGEN CHLORIDE IS LIBERATED PER MOLE OF FEED, AND RECOVERING THE RESULTANT POLYCHLOROBENZENES.
Claim 2
Independent Claim
65 words
THE METHOD WHICH CONSISTS ESSENTIALLY IN HEATING A COMPOUND FROM THE GROUP CONSISTING OF BENZENE HEXACHLORIDE, MONOCHLOROBENZENE HEXACHLORIDE AND DICHLOROBENZENE HEXACHLORIDE WITH FROM 0.5 TO 5 PER CENT OF ITS WEIGHT OF ANHYDROUS ALUMINUM CHLORIDE AT A TEMPERATURE ABOVE 90* C. AT WHICH HYDROGEN CHLORIDE IS LIBERTED, UNTIL ABOUT 3 MOLES OF HYDROGEN CHLORIDE IS LIBERATED PER MOLE OF FEED, AND RECOVERING THE RESULTANT POLYCHLOROBENZENES.
References Cited (Backward Citations)
US2467123A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-01 | 1955-04-02 | 1955-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-01 | 1959-04-02 | 1959-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-01 | 1963-04-02 | 1963-10-02 | $7700.00 | Window Closed / Lapsed |