US3284484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorinated aromatic nitriles and preparation thereof
Assignee: National Smelting Co Ltd
•
Filing: 1963-04-02
•
Granted: 1966-11-08
•
Expires: 1983-04-02
Abstract
No abstract record available.
Inventors
- 👤 Belf Leon Jerzy
- 👤 Buxton Michael William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:33
CPC Classifications
C; C07; C07C; C07C255/00; C07C255/49; C07C255/50; C07C255/51
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
1 words
1,2-DICYANO-3,4,5,6-TETRAFLUOROBENZENE.
Claim 2
Dependent Claim
1 words
1,2-DICYANO-3,4,5,6-TETRAFLUOROBENZENE.
Claim 3
Independent Claim
60 words
A METHOD FOR PREPARING A FLUORINATED NITRILE FROM THE GROUP CONSISTING OF PENTAFLUOROBENZONITRILE; 1,2-DICYANOTETRAFLUOROBENZENE; 1,3-DICYANOTETRAFLUOROBENZENE; AND 1,4 DICYANOTERTRAFLUOROBENZENE, COMPRISING HEATING A COMPOUND FROM THE GROUP CONSISTING OF C6F5CL, C6F5BR, C6F5I, C6FFCL2, C6F4BR2 AND C6F4I2 WITH CUPROUS CYANIDE IN A POLAR APROTIC SOLVENT SELECTED FROM THE GROUP CONSISTING OF DIMETHYLFORMAMIDE AND N-METHYLPYRROLIDONE AT A TEMPERATURE BETWEEN 100* C. AND 200* C.
Claim 4
Independent Claim
60 words
A METHOD FOR PREPARING A FLUORINATED NITRILE FROM THE GROUP CONSISTING OF PENTAFLUOROBENZONITRILE; 1,2-DICYANOTETRAFLUOROBENZENE; 1,3-DICYANOTETRAFLUOROBENZENE; AND 1,4 DICYANOTERTRAFLUOROBENZENE, COMPRISING HEATING A COMPOUND FROM THE GROUP CONSISTING OF C6F5CL, C6F5BR, C6F5I, C6FFCL2, C6F4BR2 AND C6F4I2 WITH CUPROUS CYANIDE IN A POLAR APROTIC SOLVENT SELECTED FROM THE GROUP CONSISTING OF DIMETHYLFORMAMIDE AND N-METHYLPYRROLIDONE AT A TEMPERATURE BETWEEN 100* C. AND 200* C.
References Cited (Backward Citations)
GB861898A
Cited
US3046313A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |