Patents Assigned to Infi-Shield
  • Method of sealing a manhole riser and a catch basin and apparatus for same
    Patent number: 5511897
    Abstract: A method and article for sealing a manhole riser and a catch basin. The method is an economical process whereby elastomeric bands are placed around a manhole riser and/or a catch basin and effectively seal the manhole riser and catch basin from infiltration of water and other contaminants.
    Type: Grant
    Filed: July 11, 1994
    Date of Patent: April 30, 1996
    Assignee: Infi-Shield
    Inventors: William P. House, William K. House