Patents by Inventor R. L. Martin

R. L. Martin 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).

  • Surface densification of porous materials
    Patent number: 5174143
    Abstract: A method for producing a densified layer on the surface of a porous material having gas-containing voids which includes: (1) heating the outer surface of the porous material to cause localized removal of the gas contained in the voids so that the voids coalesce and form surface-connected channels, and (2) deforming the surface of the porous material to close the surface-connected channels so that a distinct, densified layer is formed at the surface of the porous material. The method is particularly applicable to the production of lightweight structural components.
    Type: Grant
    Filed: November 5, 1991
    Date of Patent: December 29, 1992
    Assignee: McDonnell Douglas Corporation
    Inventor: R. L. Martin