Patents by Inventor David A. Hitchen

David A. Hitchen 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).

  • Shampoo composition
    Patent number: 5152914
    Abstract: A shampoo composition comprising in addition to water(a) from 2 to 40% by weight of surfactant chosen from anionic, nonionic or amphoteric surfactants, or mixtures thereof;(b) from 0.01 to 10% by weight of insoluble, non-volatile silicone;(c) from 0.5 to 5% by weight of suspending agent chosen from polyethylene glycol mono- or diesters of C.sub.16-22 fatty acid, having from 2 to 7 ethylene oxide groups.The composition may further comprise a cationic conditioning agent.
    Type: Grant
    Filed: May 29, 1990
    Date of Patent: October 6, 1992
    Assignee: Chesebrough-Pond's USA Co., Division of Conopco, Inc.
    Inventors: Deborah J. Forster, David A. Hitchen, Euan S. Reid
  • Porous carbon structures and methods for their preparation
    Patent number: 4775655
    Abstract: This invention relates to the production of a novel, porous, carbon structure. A stabilised porous polymer comprising cavities joined by interconnecting pores is heated in an inert atmosphere to yield a stable, porous, carbon structure having the inherent structure of the original stabilised polymer.
    Type: Grant
    Filed: November 17, 1986
    Date of Patent: October 4, 1988
    Assignee: Internationale Octrooi Maatschappij "Octropa"
    Inventors: Christopher J. C. Edwards, David A. Hitchen, Martin Sharples