A method of manufacturing chipboards, fibre boards and the like boards
CA 2283592 C · Owner: Dueholm, Sten · Inventors: Dueholm, Sten
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of manufacturing plates, such as chipboards fibre boards and the , like boards, where the raw material in form of biomass particles such as wood , chips, wood fibres and the like applied with a thermosetting binder is spread onto a preforming band into an endless mat and where this mat (B) is pre-, compressed in a continuously operating prepress (C) and then completely pressed in a continuously operating hot press whereby the mat (B) is , compressed into the desired thickness of the finished plate and the thermosetting binder is hardened. According to the invention the mat (B) is , pretreated by means of steam immediately before the introduction into the hot press (E) by means …
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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 March 10, 1998 and granted April 24, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 10, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 10, 2020.
- 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.