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:
Feb. 25, 1992
Filed:
Sep. 28, 1990
Applicant:
Inventors:
Klaus Jelich, Wuppertal, DE;
Hans Lindel, Leverkusen, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
20415764 ; 546346 ;
Abstract
A process for the preparation of 3-trichloromethylpyridine of the formula ##STR1## which comprises reacting 3-methyl-pyridine hydrogen sulphate of the formula ##STR2## with elemental chlorine which exposure to at least one of visible and ultraviolet light at a temperature between about 70.degree. C. and 150.degree. C.