Patents by Inventor Richard E. St. Laurent

Richard E. St. Laurent 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 thawing machine
    Patent number: 4124039
    Abstract: Machine for thawing frozen pipes by forcing hot water from a heated reservoir through a flexible tube advanced into the pipe as the ice melts with means to return water and melt to the reservoir through a duct sealed to the end of the pipe.
    Type: Grant
    Filed: July 28, 1977
    Date of Patent: November 7, 1978
    Inventor: Richard E. St. Laurent