Patents by Inventor Brian D. Burkholder

Brian D. Burkholder 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 the preparation of polyamino succinic acids and derivatives thereof
    Patent number: 6465690
    Abstract: A process for preparing polyamino monosuccinic acids, salts or chelates thereof by (a) reacting a maleic or fumaric acid ester or mixtures thereof with a polyamino compound in a primary alcohol as a solvent, (b) hydrolyzing the product obtained in step (a), and (c) separating the primary alcohol. The use of a primary alcohol as the solvent results in a markedly purer polyamino monosuccinic acid product and simpler reaction conditions than when the solvent is a secondary or tertiary alcohol.
    Type: Grant
    Filed: February 23, 2000
    Date of Patent: October 15, 2002
    Assignee: The Dow Chemical Company
    Inventors: Alan D. Strickland, David A. Wilson, Brian D. Burkholder, Druce K. Crump