Patents by Inventor Raymond Y. Roy

Raymond Y. Roy 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 heating of workpieces
    Patent number: 5202541
    Abstract: A method of heating a workpiece assembly and a load assembly suitable for heating by the method. The method involves heating the workpiece assembly in a microwave cavity surrounded by one or more rings made of electrically conductive material. The rings fix the electrical field in such a way that uniform heating of the workpiece assembly can be achieved. Large workpieces or assemblies can be heated and, if sinterable, sintered in this way without the problems normally caused by lack of uniform fields when microwaves are used to heat large loads.
    Type: Grant
    Filed: January 28, 1991
    Date of Patent: April 13, 1993
    Assignee: Alcan International Limited
    Inventors: Mark C. L. Patterson, Raymond Y. Roy, Robert M. Kimber, Prasad S. Apte