Patents by Inventor Kenrick H. Mast

Kenrick H. Mast 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).

  • Pipe unfreezer
    Patent number: 4250925
    Abstract: Apparatus for unthawing frozen water pipe including a feed tube which is advanced into the frozen pipe having a probing end formed by pliant fingers forming a tip for the feed tube. The feed tube is directed into the pipe by a tube channeling length of hose means through which the feed tube passes loosely. A static pressure of water prevents leakage of water from the tube channeling length of hose means.
    Type: Grant
    Filed: July 13, 1979
    Date of Patent: February 17, 1981
    Inventor: Kenrick H. Mast