The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 25, 1989
Filed:
Aug. 22, 1986
Applicant:
Inventors:
George E Ham, Lake Jackson, TX (US);
Robert D Spradling, Lake Jackson, TX (US);
John M McIntyre, Lake Jackson, TX (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
204 / ; 204 / ; 204 / ; 204 62 ; 204 72 ;
Abstract
Symmetrical or 2,3,5,6-tetrahalopyridine is prepared from pentahalopyridine in an electrolytic cell by forming an organic solvent-free emulsion of pentahalopyridine and tetrahalopyridine and by electrolyzing the emulsion.