Patent US2647143A successfully refreshed from Google Patents.
US2647143A
Expired / Lapsed
US
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Manufacture of perchloromethyl mercaptan
Assignee: Stauffer Chemical Co
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Filing: 1951-12-06
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Granted: 1953-07-28
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Expires: 1971-12-06
Abstract
No abstract record available.
Inventors
- 👤 Harold M Pitt
- 👤 Boggs Wilburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:21
CPC Classifications
C; C07; C07C; C07C313/00; C07C313/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A PROCESS FOR PURIFYING CRUDE PERCHLOROMETHYL MERCAPTAN CONTAINING SULFUR CHLORIDE AND COMPLEXES RESULTING FROM REACTION OF CHLORINE AND CARBON DISULFIDE DURING MANUFACTURE OF PRE-CHLOROMETHYL MERCAPTAN, COMPRISING AGITATING THE CRUDE PERCHLOROMETHYL MERCAPTAN WITH AN AQUEOUS PHASE ACIDIFED TOA PH BELOW 4.5 WHILE INTRODUCING CHLORIDE TO REACT WITH THE SULFUR CHLORIDE AND FROM SULFUR ACID AND HYDROCHLORIC ACID AND TO OXIDIZE THE COMPLEXES PRESENT AND FROM MATERIALS SOLUBLE IN THE AQUEOUS PHASE, AND SEPARATING THE PERCHLOROMETHYL MERCAPTAN FROM THE AQUEOUS PHASE.
Claim 2
Dependent Claim
79 words
A PROCESS FOR PURIFYING CRUDE PERCHLOROMETHYL MERCAPTAN CONTAINING SULFUR CHLORIDE AND COMPLEXES RESULTING FROM REACTION OF CHLORINE AND CARBON DISULFIDE DURING MANUFACTURE OF PRE-CHLOROMETHYL MERCAPTAN, COMPRISING AGITATING THE CRUDE PERCHLOROMETHYL MERCAPTAN WITH AN AQUEOUS PHASE ACIDIFED TOA PH BELOW 4.5 WHILE INTRODUCING CHLORIDE TO REACT WITH THE SULFUR CHLORIDE AND FROM SULFUR ACID AND HYDROCHLORIC ACID AND TO OXIDIZE THE COMPLEXES PRESENT AND FROM MATERIALS SOLUBLE IN THE AQUEOUS PHASE, AND SEPARATING THE PERCHLOROMETHYL MERCAPTAN FROM THE AQUEOUS PHASE.
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) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |