Patents by Inventor by William A. Martin, legal representative

by William A. Martin, legal representative 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).

  • Lining of pipelines or passageways using a push rod adhered to rod and liner
    Patent number: 6146491
    Abstract: The lining of lateral pipelines is effected from the service end by inserting a resin impregnated lining tube into the lateral using a push rod. The leading end of the push rod is attached to the liner by a relaeasble device so that once the liner is in place, and the rod pulled back, the liner detaches and remains in the lateral. The liner is held in folded state by straps which are broken as the rod is pulled back in that a rope attached to the leading end of the rod is trapped under the straps and breaks them one by one as the rod is retracted.
    Type: Grant
    Filed: July 27, 1998
    Date of Patent: November 14, 2000
    Assignee: Insituform
    Inventors: Eric Wood, deceased, by Miranda Jane Bull, legal representative, by William A. Martin, legal representative