Patents by Inventor Robert Patrick Guenther

Robert Patrick Guenther 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).

  • Method and apparatus for cleaning tubular structures
    Patent number: 4021265
    Abstract: Removal of foreign objects from tubular structures is accomplished by inserting a pressurizable tube with an expandable end chamber into the tubular structure past the position of the foreign object, forming a seal within the interior of the structure by expanding the end chamber, and withdrawing the tube to remove the obstruction. If desired, cleansing of the inner surface of the structure can be achieved by feeding a cleaning substance into the tube as it is being withdrawn.
    Type: Grant
    Filed: December 4, 1975
    Date of Patent: May 3, 1977
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: Robert Patrick Guenther