Patents by Inventor Jon D. Lehmkuhler

Jon D. Lehmkuhler 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).

  • Continuous process for the manufacture of phosphoric acid esters
    Patent number: 6388120
    Abstract: A method of making phosphoric acid esters by continuously reacting a phosphorus oxyhalide with a polyol to produce at least about 60% normalized monomeric halophosphate intermediate, and then reacting the monomeric halophosphate intermediate with an alcohol to produce a desired phosphoric acid ester is provided. In other embodiments, the reaction of the monomeric halophosphate intermediate with the alcohol can also be carried out continuously. Another aspect of the invention provides a method of making phosphoric acid esters by continuously reacting a phosphorus oxyhalide with a monohydric alcohol to produce at least about 60% normalized monohalomonophosphate diester intermediate, and then reacting the monohalomonophosphate diester intermediate with a polyol to produce a phosphoric acid ester. In other embodiments, the reaction of the monohalomonophosphate diester intermediate with the polyol may also be carried out continuously.
    Type: Grant
    Filed: April 28, 1999
    Date of Patent: May 14, 2002
    Assignee: PABU Services, Inc.
    Inventors: Robert M. Farner, David W. Bartley, Jon D. Lehmkuhler