Patents Assigned to Contech Constructions Products Inc.
  • Box culvert
    Patent number: 5720577
    Abstract: A box culvert formed from a plurality of corrugated sections. Reinforcing ribs are secured to the outside surface of the culvert. A universal receiving channel is provided for each lower edge of the culvert and may be used to secure lower edge portions extending at different angles relative to horizontal. A rib configuration is disclosed which results in manufacturing and material savings.
    Type: Grant
    Filed: October 11, 1995
    Date of Patent: February 24, 1998
    Assignee: Contech Constructions Products Inc.
    Inventors: Darrell J. Sanders, Allan P. Schoulties