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:
Mar. 12, 1985
Filed:
Apr. 06, 1983
Applicant:
Inventors:
Takahiro Haga, Kusatsu, JP;
Tohru Koyanagi, Kyoto, JP;
Toshio Nakajima, Moriyama, JP;
Takeshi Ohshima, Kusatsu, JP;
Assignee:
Ishihara Sangyo Kaisha Ltd., Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
546318 ; 546320 ;
Abstract
A chloronicotinic acid compound is prepared by hydrolyzing a 3-trichloromethyl pyridine compound in the presence of sulfuric acid or phosphoric acid. By this process, a highly pure chloronicotinic acid compound is obtainable in good yield. This compound is useful as an intermediate for medicines.