Patents by Inventor Clifford H. Grueschow

Clifford H. Grueschow 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).

  • Filter unit
    Patent number: 4144169
    Abstract: A filter unit, and method of assembly thereof, of the type to be used with the circulating lubrication system of an internal combustion engine; the unit including an enclosure having sidewall and end sections, a filter element disposed within the enclosure, an additive body within the enclosure between the end section thereof, and the filter element and means, including a helical coil spring, interposed between the filter element and additive body for preventing relative movement thereof within the enclosure.
    Type: Grant
    Filed: June 6, 1977
    Date of Patent: March 13, 1979
    Assignee: Monroe Auto Equipment Company
    Inventor: Clifford H. Grueschow