US2852571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of polychlorobenzenes
Assignee: Pechiney SA
•
Filing: 1952-05-05
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Granted: 1958-09-16
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Expires: 1972-05-05
Abstract
No abstract record available.
Inventors
- 👤 Frejacques Jean Leon Maurice
- 👤 Guinot Henri Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:13
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/093; C07C17/10; C07C17/12; C07C17/25; C07C17/35; C07C17/357
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A PROCESS FOR PRODUCING POLYCHLOROBENZENES CONTAINING MORE THAN THREE CHLORINE ATOMS IN THE MOLECULES WHICH COMPRISES, HEATING A MIXTURE OF BENZENE HEXACHLORIDE VAPORS WITH AIR IN THE PRESENCE OF A DEACON PROCESS TYPE CATALYST AT AN ELEVATED TEMPERATURE AT WHICH THE BENZENE HEXACHLORIDE DECOMPOSES AND THE DESIRED POLYCHLOROBENZENES ARE FORMED.
Claim 2
Dependent Claim
50 words
A PROCESS FOR PRODUCING POLYCHLOROBENZENES CONTAINING MORE THAN THREE CHLORINE ATOMS IN THE MOLECULES WHICH COMPRISES, HEATING A MIXTURE OF BENZENE HEXACHLORIDE VAPORS WITH AIR IN THE PRESENCE OF A DEACON PROCESS TYPE CATALYST AT AN ELEVATED TEMPERATURE AT WHICH THE BENZENE HEXACHLORIDE DECOMPOSES AND THE DESIRED POLYCHLOROBENZENES ARE FORMED.
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) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |