Patents by Inventor L. David Landrith

L. David Landrith 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).

  • Resin transfer molding process
    Patent number: 4891176
    Abstract: A method for manufacturing a panel, such as an automotive panel, using the resin transfer molding (RTM) process. The method includes the steps of preforming a first mat of glass fibers into a shape approximating one side of the panel and, similarly, preforming a second mat of glass fibers into a shape approximating a second side of the panel. A urethane core is sandwiched in between the preformed mats to thereby form a premolded assembly. This premolded assembly is placed into a mold and a settable resin is injected into the mold to form the panel.
    Type: Grant
    Filed: May 31, 1988
    Date of Patent: January 2, 1990
    Assignee: Auto-Fab, Inc.
    Inventors: James P. Drysdale, L. David Landrith