US2664442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the purification of perchloromethyl mercaptan
Assignee: Mathieson Chemical Corp
•
Filing: 1950-12-27
•
Granted: 1953-12-29
•
Expires: 1970-12-27
Abstract
No abstract record available.
Inventors
- 👤 Kamlet Jonas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:01
CPC Classifications
C; C07; C07C; C07C313/00; C07C313/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
IN A PRODUCTION OF PERCHLOROMETHYL MERCAPTAN BY CHLORINATION OF CARBON BISULFIDE, THE IMPROVEMENT WHICH COMPRISES REACTING THE REACTION MIXTURE OBTAINED BY THE CHLORINATION OF THE CARBON BISULFIDE WITH SULFUR TRIOXIDE AT A TEMPERATURE NOT IN EXCESS OF ABOUT 90* C., AND RECOVERING PERCHLOROMETHYL MERCAPTAN BY DISTILLATION.
Claim 2
Dependent Claim
46 words
IN A PRODUCTION OF PERCHLOROMETHYL MERCAPTAN BY CHLORINATION OF CARBON BISULFIDE, THE IMPROVEMENT WHICH COMPRISES REACTING THE REACTION MIXTURE OBTAINED BY THE CHLORINATION OF THE CARBON BISULFIDE WITH SULFUR TRIOXIDE AT A TEMPERATURE NOT IN EXCESS OF ABOUT 90* C., AND RECOVERING PERCHLOROMETHYL MERCAPTAN BY DISTILLATION.
References Cited (Backward Citations)
US2362057A
Cited
US2545285A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-28 | 1957-06-29 | 1957-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-28 | 1961-06-29 | 1961-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-28 | 1965-06-29 | 1965-12-29 | $7700.00 | Window Closed / Lapsed |