Patents by Inventor Helmut Grub

Helmut Grub 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).

  • Compositions which have a physiological cooling effect, and active compounds suitable for these compositions
    Patent number: 5266592
    Abstract: Ketals, preferably glycerol ketals such as, for example, 1-menthone glycerol ketal or 3,3,5-trimethylcyclohexanone glycerol ketal, have a physiological cooling effect and are therefore suitable as active compounds in compositions which are intended to cause a sensation of freshness on human skin or mucous membrane.
    Type: Grant
    Filed: April 3, 1992
    Date of Patent: November 30, 1993
    Assignee: Haarmann & Reimer GmbH
    Inventors: Helmut Grub, Ralf Pelzer, Rudolf Hopp, Roland Emberger, Heinz-Jurgen Bertram