Patent US3202690A successfully refreshed from Google Patents.
US3202690A
Expired / Lapsed
US
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Preparation of thiocyanophenols
Assignee: Consolidation Coal Co
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Filing: 1962-10-08
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Granted: 1965-08-24
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Expires: 1982-10-08
Abstract
No abstract record available.
Inventors
- 👤 Edward P Previc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:46
CPC Classifications
C; C07; C07C; C07C331/00; C07C331/02; C07C331/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A PROCESS FOR PREPARING A THIOCYANOPHENOL WHICH COMPRISES DISSOLVING A PHENOL SELECTED FROM THE CLASS CONSISTING OF PHENOL AND A LOWER ALKYL PHENOL AND AMMONIUM THIOCYANATE IN AN INERT ANHYDROUS SOLVENT THEREFOR, ADDING CHLORINE TO THE SOLUTION TO LIBERATE THIOCYANOGEN TO REACT WITH SAID PHENOL WHEREBY THE THIOCYANOPHENOL AND THIOCYANIC ACID ARE FORMED, ADDING ANHYDROUS AMMONIA TO SAID SOLUTION AT A TEMPERATURE BELOW 50*C. IN AN AMOUNT AT LEAST SUFFICIENT TO NEUTRALIZE THE THIOCYANIC ACID TO FORM AMMONIUM THIOCYANATE, AND SUBSEQUENTLY RECOVERING THE THIOCYANOPHENOL.
Claim 2
Dependent Claim
84 words
A PROCESS FOR PREPARING A THIOCYANOPHENOL WHICH COMPRISES DISSOLVING A PHENOL SELECTED FROM THE CLASS CONSISTING OF PHENOL AND A LOWER ALKYL PHENOL AND AMMONIUM THIOCYANATE IN AN INERT ANHYDROUS SOLVENT THEREFOR, ADDING CHLORINE TO THE SOLUTION TO LIBERATE THIOCYANOGEN TO REACT WITH SAID PHENOL WHEREBY THE THIOCYANOPHENOL AND THIOCYANIC ACID ARE FORMED, ADDING ANHYDROUS AMMONIA TO SAID SOLUTION AT A TEMPERATURE BELOW 50*C. IN AN AMOUNT AT LEAST SUFFICIENT TO NEUTRALIZE THE THIOCYANIC ACID TO FORM AMMONIUM THIOCYANATE, AND SUBSEQUENTLY RECOVERING THE THIOCYANOPHENOL.
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) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |