Patents by Inventor Ernestine Mandler

Ernestine Mandler has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for manufacturing diazinon
    Patent number: 4898942
    Abstract: An improved process for the production of Diazinon substantially free of toxic by-products in high yield and very high purity which involves mixing 2-isopropyl-4-methyl-6-hydroxypyrimidine with solid sodium or potassium hydroxide in a ketone or ether solvent at a temperature of about 50.degree.-60.degree. C. until a homogeneous mixture is formed, adding diethylthiophosphoryl chloride to the homogeneous mixture, keeping the mixture at a temperature of 55.degree.-80.degree. C. until the reaction is complete, and separating the Diazinon formed.
    Type: Grant
    Filed: August 30, 1988
    Date of Patent: February 6, 1990
    Assignee: Makhteshim Chemical Works, Ltd.
    Inventors: David Ovadia, Ernestine Mandler