US2691635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of dialkyl thionocarbamates
Assignee: Dow Chemical Co
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Filing: 1953-05-20
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Granted: 1954-10-12
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Expires: 1973-05-20
Abstract
No abstract record available.
Inventors
- 👤 Guy H Harris
- 👤 Bryant C Fischback
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:56
CPC Classifications
C; C07; C07C; C07C333/00; C07C333/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A PROCESS FOR THE PRODUCTION OF ALKYL THIONOCARBAMIC ESTERS COMPRISING THE STEPS (1) REACTING, AT A TEMPERATURE OF FROM 15* TO 70* C. FOR AT LEAST 1/2 HOUR, AN ALKALI METAL HYDROXIDE, CARBON DISULFIDE, AND AN ALIPHATIC ALCOHOL CONTAINING FROM 1 TO 6 CARBON ATOMS; (2) TREATING THE RESULTANT MIXTURE WITH AN ALKYL HALIDE FOR AT LEAST 1/2 HOUR AT A TEMPERATURE OF FROM 25* TO 70* C.; (3) INTRODUCING AN ALKYL AMINE CONTAINING FROM 1 TO 6 CARBON ATOMS INTO THE MIXTURE AT A TEMPERATURE OF FROM 15* TO 50* C.; (4) REMOVING THE FORMED MERCAPTAN AND REMAINING ALCOHOL; (5) SEPARATING THE ORGANIC AND AQUEOUS PHASES; AND (6) DRYING THE ORGANIC LAYER.
Claim 2
Dependent Claim
113 words
A PROCESS FOR THE PRODUCTION OF ALKYL THIONOCARBAMIC ESTERS COMPRISING THE STEPS (1) REACTING, AT A TEMPERATURE OF FROM 15* TO 70* C. FOR AT LEAST 1/2 HOUR, AN ALKALI METAL HYDROXIDE, CARBON DISULFIDE, AND AN ALIPHATIC ALCOHOL CONTAINING FROM 1 TO 6 CARBON ATOMS; (2) TREATING THE RESULTANT MIXTURE WITH AN ALKYL HALIDE FOR AT LEAST 1/2 HOUR AT A TEMPERATURE OF FROM 25* TO 70* C.; (3) INTRODUCING AN ALKYL AMINE CONTAINING FROM 1 TO 6 CARBON ATOMS INTO THE MIXTURE AT A TEMPERATURE OF FROM 15* TO 50* C.; (4) REMOVING THE FORMED MERCAPTAN AND REMAINING ALCOHOL; (5) SEPARATING THE ORGANIC AND AQUEOUS PHASES; AND (6) DRYING THE ORGANIC LAYER.
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) | 1957-10-11 | 1958-04-12 | 1958-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-11 | 1962-04-12 | 1962-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-11 | 1966-04-12 | 1966-10-12 | $7700.00 | Window Closed / Lapsed |