Patents by Inventor Thomas D. Murry

Thomas D. Murry 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).

  • CROSS CONNECT VIA FOR MULTILAYER PRINTED CIRCUIT BOARDS
    Publication number: 20040108137
    Abstract: A printed circuit board (B) with a mechanical attachment of connector pins (42a and 42b) to opposite sides of the same plated through location (34) maintains electrical isolation between the board sides (14 and 16). A sequence of controlled depth drilling steps creates a hole (34) through the printed circuit board (B) with multiple diameters (20, 24, 30 and 40).
    Type: Application
    Filed: July 21, 2003
    Publication date: June 10, 2004
    Applicant: LITTON SYSTEMS, INC.
    Inventors: Stephen J. VETTER, Thomas D. MURRY, Randolph A. LATALL, Sharon L. COOK, Eric W. MONTGOMERY
  • Method for improving insulation resistance of printed circuits
    Patent number: 4978422
    Abstract: After the etching away of copper to selectively expose surface areas of insulating material in a printed circuit process based upon copper foil-clad insulating substrate material, the exposed surface areas of insulating material are contacted with an aqueous alkaline permanganate solution to remove from the areas residual metal species associated therewith so as to improve the electrical resistance afforded by those areas in the printed circuit.
    Type: Grant
    Filed: March 20, 1990
    Date of Patent: December 18, 1990
    Assignee: MacDermid, Incorporated
    Inventors: Raymond A. Letize, David D. Sullivan, William R. Thomas, Thomas D. Murry