Board building material, board building material producing method, board building material installation method
CA 2567461 C · Owner: Amagai, Yasuyuki · Inventors: Amagai, Yasuyuki; Hasegawa, Tomoya; Okazaki, Shoichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Perforations of a board for building material are formed by a number of recesses (13), or a number of recesses (13) and through-holes (12). A bottom face (16) of the recess forms a face for screwing or driving the fixing element (70) thereto. A color of the bottom face is set to have a brightness of color decreased in comparison with a color of a surface (18) of the board. A substrate of the board is a gypsum board and the bottom face of the recess is formed by a liner paper for gypsum board. According to such a board, a region for screwing or driving the fixing element thereto can be ensured without impairing regularity uniformity or architectural , design of the perforations and …
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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 April 27, 2005 and granted October 2, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 27, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.