Patents by Inventor Marc A. St. John

Marc A. St. John 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).

  • Microwave waveguide assembly and method for making same
    Patent number: 6560850
    Abstract: A waveguide and a method for assembling the same are provided. The waveguide comprises a first half and a second half. A gasket is applied to a first mating surface of the first half. The first mating surface of the first half is aligned with a second mating surface of the second half. The gasket is positioned between the first mating surface of the first half and the second mating surface of the second half. The first half is fastened to the second half to form the assembled waveguide.
    Type: Grant
    Filed: April 4, 2001
    Date of Patent: May 13, 2003
    Assignee: Hughes Electronics Corporation
    Inventors: Marc St. John, Barre Lankford, Steve Stowell
  • Plastic lumber pallets
    Patent number: 6524426
    Abstract: A plastic pallet assembly is formed from plastic lumber by melting sections of runners and cross members and contacting them to join said runners and said cross members to form a pallet. A machine having an assembly table, cross members for supporting and moving pallet runners in a vertical direction, a support table for a pallet cross member, hot plates moveable in a vertical direction and in a horizontal direction for insertion between the runners and the cross member, and a force bar moveable in a vertical direction for applying a force to the runners, hot plates and cross member.
    Type: Grant
    Filed: June 15, 2000
    Date of Patent: February 25, 2003
    Assignee: Edison Welding Institute
    Inventors: Marc A. St. John, Kevin M. Hartke
  • Microwave waveguide assembly and method for making same
    Publication number: 20020144392
    Abstract: A waveguide and a method for assembling the same are provided. The waveguide comprises a first half and a second half. A gasket is applied to a first mating surface of the first half. The first mating surface of the first half is aligned with a second mating surface of the second half. The gasket is positioned between the first mating surface of the first half and the second mating surface of the second half. The first half is fastened to the second half to form the assembled waveguide.
    Type: Application
    Filed: April 4, 2001
    Publication date: October 10, 2002
    Inventors: Marc St. John, Barre Lankford, Steve Stowell
  • Thermoplastic welding
    Patent number: 5313034
    Abstract: A process for obtaining long, continuous, thermoplastic welds on large structures. A series of tabs are used in pairs and especially in alternating, overlapping pairs to obtain resistance heating of a strip material placed in the bond line. The resistance of the tabs is less than that of the strip material. Conducting braid-tubes afford continuous welding when the bond line is curved. Alternatively, an electromagnetic field is used to take advantage of the induction heating. A wide susceptor is used to weld a current conducting substrate while avoiding bulk heating of the substrate. The unexpected property of current-conducting braid-tube susceptors, in which induction heating takes place at the center rather than at the edges of a flattened braid-tube susceptor, is used to obtain long continuous curved welds.
    Type: Grant
    Filed: January 15, 1992
    Date of Patent: May 17, 1994
    Assignee: Edison Welding Institute, Inc.
    Inventors: Robert A. Grimm, David A. Grewell, Marc St. John