Patent US3101344A successfully refreshed from Google Patents.
US3101344A
Expired / Lapsed
US
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Process for preparing tetracyano-1,4-dithiin
Assignee: EIDP Inc
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Filing: 1961-02-28
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Granted: 1963-08-20
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Expires: 1981-02-28
Abstract
No abstract record available.
Inventors
- 👤 Robert D Vest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:57
CPC Classifications
C; C07; C07D; C07D339/00; C07D339/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
IN THE PREPARATION OF TETRACYANO-1,4-DITHIIN, THE STEPS WHICH COMPRISE (1) CONTACTING, AT A TEMPERATURE NOT GREATER THAN ABOUT 75*C., A SALT OF THE GROUP CONSISTING OF THE ALKALI METAL AND TERTA (1-2 CARBON ALKYL) AMMONIUM SALTS OF CYANODITHIOFORMIC ACID WITH AN OXIDIZING AGENT OF THE GROUP CONSISTING OF CHLORINE, BROMINE, THIONYL CHLORIDE AND SULFURYL CHLORIDE IN AN ESSENTIALLY ANHYDROUS LIQUID ORGAINC SOLVENT IN WHICH THE SALT OF CYANODITHIOFORMIC ACID IS STABLE AND (2) SUBSEQUENTLY, WITHIN ABOUT ONE HOUR, SEPARATING TERTACYANO-1,4-DITHIIN FROM THE SOLVENT.
Claim 2
Dependent Claim
83 words
IN THE PREPARATION OF TETRACYANO-1,4-DITHIIN, THE STEPS WHICH COMPRISE (1) CONTACTING, AT A TEMPERATURE NOT GREATER THAN ABOUT 75*C., A SALT OF THE GROUP CONSISTING OF THE ALKALI METAL AND TERTA (1-2 CARBON ALKYL) AMMONIUM SALTS OF CYANODITHIOFORMIC ACID WITH AN OXIDIZING AGENT OF THE GROUP CONSISTING OF CHLORINE, BROMINE, THIONYL CHLORIDE AND SULFURYL CHLORIDE IN AN ESSENTIALLY ANHYDROUS LIQUID ORGAINC SOLVENT IN WHICH THE SALT OF CYANODITHIOFORMIC ACID IS STABLE AND (2) SUBSEQUENTLY, WITHIN ABOUT ONE HOUR, SEPARATING TERTACYANO-1,4-DITHIIN FROM THE SOLVENT.
References Cited (Backward Citations)
US3000780A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-19 | 1967-02-18 | 1967-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-19 | 1971-02-18 | 1971-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-19 | 1975-02-18 | 1975-08-20 | $7700.00 | Window Closed / Lapsed |