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:
Sep. 14, 1976
Filed:
May. 19, 1975
Applicant:
Inventors:
Don Wesley Long, Trenton, NJ (US);
Robert Arthur Ralston, Lebanon, NJ (US);
Assignee:
American Cyanamid Company, Stamford, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2605 / ;
Abstract
A superior grade of 1,3-bis(4-chlorobenzylideneamino)-guanidine hydrochloride is obtained by dispersing crude material in a suitable solvent, slowly adding to the dispersion an amount of base at least equivalent to the number of moles of 1,2,3-tris(4-chlorobenzylideneamino)guanidine hydrochloride present in said crude 1,3-bis(4-chlorobenzylideneamino)guanidine hydrochloride, separating the purified 1,3-bis(4-chlorobenzylideneamino)guandidine hydrochloride therefrom, and washing and drying the same.