Patents by Inventor John Harold Rennie

John Harold Rennie 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).

  • Antiperspirant material and compositions containing it
    Patent number: 6245324
    Abstract: A particulate antiperspirant active material which has been surface treated with an alkanolamine is described. After surface treatment, the surface treatment agent is in intimate contact with the surface or outer layer of the substrate material, that is, the antiperspirant material may be either deposited on the surface or at least a fraction of the agent may be absorbed within the outer layer of the substrate. The resultant particulate material shows a reduced tendency to separate from a liquid carrier phase containing a polyglycol ether and a suspending agent.
    Type: Grant
    Filed: September 2, 1999
    Date of Patent: June 12, 2001
    Assignee: Unilever Home & Personal Care USA, Division of Conopco, Inc.
    Inventors: Gordon Charles Hough, David Terence Parrott, John Harold Rennie