Patents by Inventor William J. Hart

William J. Hart 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).

  • Patent number: 11920517
    Abstract: A turbine engine heat exchanger has an array of heat exchanger plates mounted to an inner case wall for providing heat transfer from a bleed flowpath to a bypass flowpath. Each plate has: first and second faces along the bypass flowpath; a proximal edge mounted to the inner case wall; an inlet along the proximal edge; an outlet along the proximal edge; and a branch segment of the bleed flowpath passing from the inlet to the outlet.
    Type: Grant
    Filed: July 25, 2022
    Date of Patent: March 5, 2024
    Assignee: RTX Corporation
    Inventors: James F. Wiedenhoefer, Russell J. Bergman, William P. Stillman, Patrick M. Hart
  • Patent number: 4738242
    Abstract: A motor vehicle door lock defroster attachment is disclosed for use in defrosting frozen door linkage mechanisms. The device includes a flexible radially corrogated tube having an attachment end shaped to engage the nozzle of a portable gas torch and a tapered discharge end positionable within the elongated space defined by the vehicle's door and door jamb. When the attachment end has been connected to the torch nozzle and the discharge end positioned in the door space in the vicinity of the frozen door linkage mechanism, heated air will move through the tube and out the discharge end thereby warming and defrosting the frozen mechanism.
    Type: Grant
    Filed: March 9, 1987
    Date of Patent: April 19, 1988
    Inventor: William J. Hart
  • Patent number: 4127422
    Abstract: Dry pigment compositions which are easily dispersed in aqueous systems are described. The compositions contain 55 to 80% of a pigment and 45 to 20% of a nonionic material comprising, by weight of the pigment, 15 to 45% of a nonionic dispersing agent and 10 to about 67% of a water-dispersible, at least partially hydrolyzed polymer of vinyl acetate or a polymer of an N-vinyl pyrrolidone.
    Type: Grant
    Filed: May 25, 1977
    Date of Patent: November 28, 1978
    Assignee: Hercules Incorporated
    Inventors: John Guzi, Jr., William J. Hart