Wood board and flooring material
CA 2127864 C · Owner: Takahasi, Hirotosi · Inventors: Iwata, Ritsuo; Takahasi, Hirotosi; Suzuki, Satoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A wood board comprising a core layer comprising one or more strand boards formed by using a foaming binder and at least one, surface layer comprising oriented strand board which is, laminated to at least one surface of the core layer the foaming, binder being a mixture of a foaming resin and a non-foaming resin at a ratio within a range of 4:1 - 1:4. It is preferable that the thin wooden strips comprising the surface layer has at least one of an average length value and an average width value thereof which is larger than that of the thin wooden strips comprising the core layer. The wood board of the present invention has particularly superior resistance to moisture and, has low density and …
Read the whole patent
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 July 12, 1994 and granted April 13, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 12, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 12, 2016.
- 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.