Patents by Inventor Jimmie Duane Christen

Jimmie Duane Christen 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).

  • Capsule shell
    Patent number: 4026986
    Abstract: Capsule shells for pharmaceutical use are presently made from gelatin. Use of water-soluble starch ethers instead of gelatin facilitates the production of the shells and produces improved shells. Preferred material is 2-hydroxypropyl starch made from high-amylose starch and having about 0.3 to 2.5 hydroxypropyl groups per glucose unit of the starch.
    Type: Grant
    Filed: May 22, 1975
    Date of Patent: May 31, 1977
    Assignee: The Dow Chemical Company
    Inventors: Jimmie Duane Christen, Wen-Jiu Cheng