Patents by Inventor Larry E. Kirkpatrick

Larry E. Kirkpatrick 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).

  • Drainage channel with means for maintaining proper slope during installation
    Patent number: 4498807
    Abstract: An anchor 20 is disclosed for supporting an open top drainage channel 40 within a trench. Anchor 20 permits accurate placement and easy adjustment of channel 40 and thereafter permits the entire channel 40 to be embedded in concrete in a single pour. The anchor 20 is embedded within the earth defining the trench and counteracts the natural buoyancy so that channel 40 does not float upwardly in the unhardened concrete.
    Type: Grant
    Filed: September 8, 1983
    Date of Patent: February 12, 1985
    Assignee: Polydrain, Inc.
    Inventors: Larry E. Kirkpatrick, Barry C. Williams