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:
Nov. 05, 1996
Filed:
Jul. 08, 1994
Applicant:
Inventors:
Elkana Gurfinkel, Omer, IL;
Yaakov Shmueli, Beer Sheva, IL;
Assignee:
Makhteshim Chemical Works Ltd., Beer-Sheva, IL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
544243 ; 544319 ;
Abstract
Diazinon is prepared by coverting the starting hydroxypyrimidine to its potassium salt by reacting it with potassium carbonate in an organic solvent after removal of the water by azeotropic distillation, and reacting the resulting non-aqueous salt with diethyl thiophosphoryl chloride and recovering the diazinon formed, wherein the quantity of potassium carbonate used relative to the starting hydroxypyrimidine is less than molar and desirably of a ratio in the range of 0.55 to 0.75.