Patents by Inventor Thomas M. Von Lehman

Thomas M. Von Lehman 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 substantially pure dialkyl phosphorochloridothionate
    Patent number: 4185053
    Abstract: A process for producing in high yields a substantially pure dialkyl phosphorochloridothionates. The process comprises chlorinating bis(phosphorothioic) sulfides, thioic acids, or salts thereof, distilling the reaction mixtures, contacting the distillate with a thioic acid or salt thereof, contacting the mixture with water and distilling the organic material after the water contacting.
    Type: Grant
    Filed: October 3, 1977
    Date of Patent: January 22, 1980
    Assignee: Stauffer Chemical Company
    Inventors: Stanley B. Mirviss, Thomas M. Von Lehman