Patents by Inventor John P. Keilp

John P. Keilp 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).

  • Production of mold charge of elastomeric material containing magnetic oxide filler
    Patent number: 4374795
    Abstract: A method for preforming magnetic drum material involves the use of a hydraulic press and sleeve which in turn compresses the material and then cuts the material into a specific shape. This process is repeated until the material builds up in the sleeve to the required charge thickness. This method has improved the molding process by eliminating air and gas voids in the molded magnetic drum.
    Type: Grant
    Filed: September 11, 1980
    Date of Patent: February 22, 1983
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: John P. Keilp, Warren F. Moore, Victor Sirbu