Patents by Inventor Michael Helioff

Michael Helioff 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).

  • Sunscreen concentrate
    Patent number: 5916544
    Abstract: A sunscreen concentrate in the form of a stable, uniform dispersion comprising, by weight:(a) about 30-65% of ultrafine titanium dioxide or zinc oxide, or mixtures thereof,(b) about 30-70% of an organic sunscreen agent, and(c) about 0.25-25% of a dispersing aid which is polyvinylpyrrolidone alkylated with a C.sub.4 -C.sub.36 alpha-olefin.
    Type: Grant
    Filed: November 12, 1997
    Date of Patent: June 29, 1999
    Assignee: ISP Investments Inc.
    Inventors: Kou-Chang Liu, Michael Helioff, Mark Rerek, Mary Davis, Lawrence J. Grenner, David E. Graham, Anja Waldorf-Geber, Renate Koppel