Expired Canadian patentCanada
Process for producing hard elements of wood
CA 2174726 C · Owner: Lindhe, Curt · Inventors: Castwall, Lennart; Lindhe, Curt
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of producing hard wooden elements by compressing wooden blanks at an isostatic pressure greater than 800 bars preferably, greater than 1000 bars.
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 November 18, 1994 and granted March 19, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 18, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 18, 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.
FiledNovember 18, 1994
GrantedMarch 19, 2002
Term endedNovember 18, 2014
Patent numberCA 2174726 C
Classification (IPC)B27M1/02
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.