Patents by Inventor Maxine J Hills

Maxine J Hills 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).

  • Use of menthyl-2 pyrrolidone-5-carboxylate as an insect repellent
    Patent number: 6451844
    Abstract: The use of menthyl 2-pyrrolidone-5-carboxylate as an insect repellent, usually by application to a substrate or into an air space. The menthyl 2-pyrrolidone-5-arboxylate can be used as a composition, which may be perfumed. A useful composition comprises a mixture of menthyl 2-pyrrolidone-5-arboxylate and a known insect repellent or a compound shown to be an effective insect repellent on a test described herein.
    Type: Grant
    Filed: March 16, 2001
    Date of Patent: September 17, 2002
    Assignee: Quest International BV
    Inventors: Stephen D Watkins, Maxine J Hills, Richard A Birch