Patents by Inventor Sylvia Hardtle

Sylvia Hardtle 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).

  • Sintering process
    Patent number: 4698096
    Abstract: This invention relates to a sintering process. More particularly, this invention relates to a process for preparing a sintered form having a tungsten content which comprises the steps of:(a) sintering a porous form of pressed tungsten alloy powders having a high tungsten content in solid phase, and(b) heat treating the sintered part from step (a) in a liquid phase.
    Type: Grant
    Filed: October 21, 1985
    Date of Patent: October 6, 1987
    Inventors: Rainer Schmidberger, Sylvia Hardtle