Construction board
CA 2005496 C · Owner: Heselius, Lars · Inventors: Brunila, Esko; Heselius, Lars
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a longitudinal lamella board (1) of binder fixed mineral wool, which is suitable as a core of a sandwich element having surface layers of e.g. thin sheet metal. The lamella board consists of adjacently disposed longitudinally directed rods (2) whose fibre planes form a right , angle to the plane of the lamella board. The length of the rods is less than half of that of the lamella board and they are jointed to each other. The joints are distributed over the lamella board so as to eliminate their weakening effect on, the resistance of the board. None of the joints is immediately next to any of the ends of the lamella board, when the board is being used as a one-field …
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 December 14, 1989 and granted November 21, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 14, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 14, 2011.
- 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.