Patents by Inventor Donald C. Marks

Donald C. Marks 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).

  • Portable pump housing for an operable submersible pump unit
    Patent number: 5860792
    Abstract: A pump enclosure assembly including a submersible pump within an elongate chamber and connected to an excess chamber having a detachable fitting extending through the access chamber to allow easy retrieval and maintenance of the pump. The pump enclosure assembly of the present invention is a sturdy, efficient, inexpensive assembly to promote the efficiency and safety of the pump itself.
    Type: Grant
    Filed: April 24, 1996
    Date of Patent: January 19, 1999
    Inventor: Donald C. Marks
  • Elongated fluid filtering assembly to prevent contamination from unwanted foreign matter and zebra mussels
    Patent number: 5795473
    Abstract: An elongated fluid filtering assembly includes an elongated filter element housed within an elongated hollow tube. The filter and hollow tube are supported on an elevated frame by at least two resilient bushings. The resilient bushings allow easy maintenance of the filter. The hollow tube contains at least one transverse slit which allows fluid to enter the fluid chamber and contact the filter. The filter assembly is easily accessible and relatively inexpensive to maintain.
    Type: Grant
    Filed: May 23, 1997
    Date of Patent: August 18, 1998
    Inventor: Donald C. Marks