Patents by Inventor Leopold Lapointe

Leopold Lapointe 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).

  • Modular, self supporting flight of stairs
    Patent number: 4422270
    Abstract: A modular, self supporting flight of stairs, comprising at least one pair of stringer units for supporting at least one step thread. Each stringer unit comprises a vertical side plate provided with an horizontal, upper flange and a vertical front plate defining with the side plate, a rectangular dihedron. This front plate is also provided with an horizontal, upper flange defining together with the upper flange of the side plate, a rigid, L-shaped support very stable in use for supporting one end of the thread. Each stringer unit also comprises a small, fixation plate integrally extending the side plate in the same plane as, or in a plane parallel to, the plane of the side plate. The stringer units of each pair are fixed to the corresponding units of a pair immediately superior or inferior thereto by riveting or bolting the fixation plates of one pair to the side plate of the other pair through a plurality of holes punched fixation plate and the lateral plate of the stringer units for receiving the bolts.
    Type: Grant
    Filed: January 19, 1982
    Date of Patent: December 27, 1983
    Assignee: G.R.S. International Inc.
    Inventors: Leopold Lapointe, Donat Pelletier