Patents by Inventor Donald Chisholm

Donald Chisholm 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).

  • Reservoirs
    Patent number: 4782538
    Abstract: A reservoir assembly (10) which has transversely extending frame assemblies (11) which support opposed side walls (12/12a). The frame assemblies (11) each have wall supporting members (15) integral with a relatively lightweight base member (16) which extends beneath the bottom wall of the reservoir. A pressure pad (18) disposed centrally above the base member (16) and beneath the bottom wall prevents upward buckling of the base member (16).
    Type: Grant
    Filed: July 23, 1986
    Date of Patent: November 8, 1988
    Inventors: Donald Chisholm, David McPherson