Patents by Inventor Robert I. Mackinnon

Robert I. Mackinnon 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).

  • Liquid treatment of small articles
    Patent number: 4073301
    Abstract: Apparatus for continuously conducting processes of cleaning, pickling or other fluid treatment of small articles such as metal turnings, cuttings, tags, bolts or coin blanks has rotating inclined drum carrying internal scroll with interruptions for providing countercurrent flows of treatment fluid flowing downward and articles moving upward; special embodiments provide for multiple stage treatments passing through plurality of coaxially rotating drums.
    Type: Grant
    Filed: September 15, 1976
    Date of Patent: February 14, 1978
    Assignee: Huntington Alloys, Inc.
    Inventor: Robert I. Mackinnon