Patents by Inventor Michael N. Croker

Michael N. Croker 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).

  • Vacuum furnace
    Patent number: 5251231
    Abstract: An electrically heated vacuum furnace has a plurality of heating elements (13) distributed in an array extending within the furnace. This allows accurate control of the application of radiant heat energy from the elements (13) of the array to articles (10) within the furnace. The elements (13) are preferably disposed spaced apart across the width of the furnace.
    Type: Grant
    Filed: November 26, 1991
    Date of Patent: October 5, 1993
    Assignee: Ipsen Industries International GmbH
    Inventors: Michael N. Croker, Michael G. Ellis