Patents by Inventor Nigel A. Heard

Nigel A. Heard 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: 4684776
    Abstract: A method for uniform bulk heating of thick viscous materials in a cavity not specifically designed for microwave heating. Microwaves are passed through a first waveguide to a polarization rotator. The direction of polarization of the incoming waves is rotated slowly and continuously and subsequently the rotated waves are passed through a second waveguide to the cavity to be heated.
    Type: Grant
    Filed: May 1, 1986
    Date of Patent: August 4, 1987
    Assignee: Shell Oil Company
    Inventor: Nigel A. Heard