Patents by Inventor Seamus French

Seamus French 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).

  • Method of producing perborate
    Patent number: 5283024
    Abstract: A method for the production of granular sodium perborate tetrahydrate is disclosed herein. The method includes the steps of adding 0.3-5% by weight of a sodium salt or a potassium salt of a polymeric carboxylic acid to powdered perborate tetrahydrate, softening the mixture by heating under pressure to form a plastically deformable mass, deforming the plastically deformable mass into thin strands by pressing, and comminuting the strands into granular form. The perborate tetrahydrate may be de-watered to produce granular perborate monohydrate. The final granular products exhibit high abrasion resistance and are preferably used in washing and cleaning agents.
    Type: Grant
    Filed: December 9, 1991
    Date of Patent: February 1, 1994
    Assignee: Degussa Aktiengesellschaft
    Inventors: Klaus Koester, Franz-Josef Carduck, Ulrich Jahnke, Seamus French