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).

  • Fit for purpose measurement system for drill hole logging
    Patent number: 11947066
    Abstract: A drill hole logging system (5) incorporates a computing system (58) at the surface and a deployment mechanism (40) for conveying a logging tool (10) configured to measure one or more geophysical parameters into a drill hole (20). A transmission means (57) communicates commands and data representing the geophysical parameters between the surface computing system and the logging tool. A borehole caliper (300) is employed to profile the inside of the borehole.
    Type: Grant
    Filed: December 1, 2020
    Date of Patent: April 2, 2024
    Assignee: REFLEX INSTRUMENTS ASIA PACIFIC PTY LTD
    Inventors: David Charles Lawie, Christopher Thomas Koplan, John Carl Jackson, Cory Bryce Wilson, Joel Hitchen, Christopher Pell, Frederick Blaine, Erik Gutterud
  • 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