Patents by Inventor C. Edward Harper, Jr.

C. Edward Harper, Jr. 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).

  • Method of making powders by electro-discharge machining in a cryogenic dielectric
    Patent number: 4731515
    Abstract: Powders, and particularly metallic powders, are produced by electro-discharge machining of electrically conductive electrodes made of the desired materials in a cryogenic dielectric. When a sufficient quantity of powder has been produced, the cryogenic dielectric is allowed to evaporate, leaving the powders available for recovery. Powders formed by this process have unique microstructures, and thus unique properties, as a result of rapid cooling in the cryogenic medium. By using an inert cryogenic dielectric, such as argon, powders uncontaminated by the dielectric are produced.
    Type: Grant
    Filed: October 22, 1986
    Date of Patent: March 15, 1988
    Assignee: Systems Research Laboratories, Inc.
    Inventors: Steven J. Savage, C. Edward Harper, Jr.