US2598561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for production of chlordane
Assignee: Velsicol Corp
•
Filing: 1949-10-03
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Granted: 1952-05-27
•
Expires: 1969-10-03
Abstract
No abstract record available.
Inventors
- 👤 Kleiman Morton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:23
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/093; C07C17/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A PROCESS FOR PREPARING 1,2,4,5,6,7,8,8-OCTACHLORO-3A,4,7,7A-TETRAHYDRO-4,7-METHANIONDANE WHICH COMPRISES REACTING 4,7-METHANO3A,4,7,7A-TETRAHYDRO-4,5,6,7,8,8-HEXACHLOROINDENE WITH SULFURYL CHLORIDE IN THE PRESENCE OF A FRIEDEL-CRAFTS TYPE CATALYS SELECTED FROM THE GROUP ALUMINUM CHLORIDE, STANNIC CHLORIDE, FERRIC CHLORIDE, ARSENIC TRICHLORIDE, ANTIMONEY PENTACHLORRIDE AND MIXTURES THEREOF AT A TEMPERATURE BELOW THE DECOMPOSITION TEMPERATURE OF THE REACTION MIXTURE COMPONENTS.
Claim 2
Dependent Claim
49 words
A PROCESS FOR PREPARING 1,2,4,5,6,7,8,8-OCTACHLORO-3A,4,7,7A-TETRAHYDRO-4,7-METHANIONDANE WHICH COMPRISES REACTING 4,7-METHANO3A,4,7,7A-TETRAHYDRO-4,5,6,7,8,8-HEXACHLOROINDENE WITH SULFURYL CHLORIDE IN THE PRESENCE OF A FRIEDEL-CRAFTS TYPE CATALYS SELECTED FROM THE GROUP ALUMINUM CHLORIDE, STANNIC CHLORIDE, FERRIC CHLORIDE, ARSENIC TRICHLORIDE, ANTIMONEY PENTACHLORRIDE AND MIXTURES THEREOF AT A TEMPERATURE BELOW THE DECOMPOSITION TEMPERATURE OF THE REACTION MIXTURE COMPONENTS.
References Cited (Backward Citations)
GB618432A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-27 | 1955-11-26 | 1956-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-27 | 1959-11-26 | 1960-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-27 | 1963-11-26 | 1964-05-27 | $7700.00 | Window Closed / Lapsed |