Substantially uncurved and unwaved plywood produced by using veneers with unstraight fibers and method for producing such a plywood
CA 2007689 C · Owner: Hasegawa, Katsuji · Inventors: Koba, Yoshinori; Itoh, Akira; Tsuruta, Matsunaga
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A substantially uncurved and unwaved plywood includes at least one pair of veneers located symmetrically with respect to a middle of a thickness of the plywood and having unstraight grains which coincide with each other. A method for producing a substantially uncurved and unwaved plywood comprises locating at least one pair of veneers with identical unstraight grains in a pair of positions symmetrical with respect to a middle of a thickness of a plywood to be produced, in such a manner than the grains of the veneers coincide with each other. A simple method for continuously preparing pairs of veneers with identical unstraight grains comprises (i) peeling from a cylindrical log with …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed January 12, 1990 and granted August 13, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 12, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 12, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.