Patents by Inventor Robert Edson Parks

Robert Edson Parks 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).

  • Renewable polishing lap
    Patent number: 5897424
    Abstract: A polishing lap which is resistant to attack from corrosive and reactive ishing media and which has a surface which is sufficiently resilient to provide good finishes without hindering dimensional controlling and accuracy of the texturing comprises: a lap substrate wherein the surface of the lap substrate has an overall shape and a localized texture; and a replaceable lap film applied to the lap substrate surface and which is deformed to correspond to the localized texture of the lap substrate surface. The polishing lap can be easily reconditioned if contaminated or easily modified for use with different abrasives and polishing media.
    Type: Grant
    Filed: July 10, 1995
    Date of Patent: April 27, 1999
    Assignee: The United States of America as represented by the Secretary of Commerce
    Inventors: Christopher James Evans, Robert Edson Parks
  • Interferometric thickness variation test method for windows and silicon wafers using a diverging wavefront
    Patent number: 5739906
    Abstract: An interferometric apparatus and method are provided for determining a ceal thickness and thickness variations of silicon wafers and other window-like optics.
    Type: Grant
    Filed: June 7, 1996
    Date of Patent: April 14, 1998
    Assignee: The United States of America as represented by the Secretary of Commerce
    Inventors: Christopher James Evans, Robert Edson Parks