Patents by Inventor Allan P. Schoulties

Allan P. Schoulties 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).

  • 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