Patents by Inventor Leonard J. Vigus

Leonard J. Vigus 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).

  • Patent number: 4521308
    Abstract: Concurrent operation of a sizable number of vacuum filtration units is facilitated by a rotatable carrier stand. Any selected one of the units may readily be turned to a position convenient to the operator without interruption of the vacuum connections and without entanglement of vacuum lines. Components of the filtration units may then be manipulated with a reduced risk of breakage, spillage or inadvertent disconnection of vacuum lines. Installation and removal of a filtration unit may be accomplished very quickly and simply with the use of only one hand in some cases. Simultaneous filtering operations may be performed more efficiently particularly within enclosures such as fume hoods, glove boxes or the like which otherwise restrict access to the filtration units by an operator.
    Type: Grant
    Filed: August 13, 1982
    Date of Patent: June 4, 1985
    Assignee: The Regents of the University of California
    Inventors: George H. Brimhall, Jr., Leonard J. Vigus