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. 30, 2021
Filed:
Oct. 27, 2017
Applicant:
Basf SE, Ludwigshafen am Rhein, DE;
Inventors:
Eric George Klauber, Huntsville, AL (US);
Birgit Gockel, Ludwigshafen, DE;
Sebastian Soergel, Limburgerhof, DE;
Roland Goetz, Ludwigshafen, DE;
Henricus Maria Martinus Bastiaans, Ludwigshafen, DE;
Jochen Dietz, Ludwigshafen, DE;
Joachim Gebhardt, Ludwigshafen, DE;
Assignee:
BASF SE, Ludwigshafen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 403/12 (2006.01); A01N 43/58 (2006.01);
U.S. Cl.
CPC ...
C07D 403/12 (2013.01); A01N 43/58 (2013.01);
Abstract
The present invention relates to a process for the purification of pyrazolpyridazines of formula I wherein the variables are as defined in the specification, by adding HCl to a solution of the pyrazolpyridazine in an inert solvent under non-aqueous conditions, effecting crystallization of the HCl-salt, isolating the resulting precipitate.