Patents by Inventor Leslie E. Carstens

Leslie E. Carstens 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).

  • Controlled release fertilizer material and process for production thereof
    Patent number: 7713326
    Abstract: Thiol ester compositions, methods of making the thiol ester compositions, and methods of using the thiol ester compositions are provided. In some embodiments, the thiol ester compositions include thiol esters, hydroxy thiol esters and cross-linked thiol esters. The thiol ester composition can be used to produce cross-linked thiol esters, sulfonic acid-containing esters, sulfonate containing esters and thioacrylate containing esters. The thiol ester compositions can be used to produce polythiourethanes. The polythiourethanes can be used in fertilizers and fertilizer coatings.
    Type: Grant
    Filed: February 17, 2005
    Date of Patent: May 11, 2010
    Assignee: Agrium Inc.
    Inventors: Leslie E. Carstens, Baozhong Xing, Mitchell D. Refvik, Jim D. Byers