Hydraulic binder-based, tapered-edge boards, production method and production line therefor, and light work construction method
CA 2536971 C · Owner: Lafarge Canada Inc. · Inventors: Laurent, Jean-Louis; Jallon, Paul; Peronnet, Frederic
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The subject of the invention is a novel plasterboard and its manufacturing processes. The novel board comprises on one side, two first parallel feathered edges and on , the other side, two other, second parallel feathered , edges that are perpendicular to the first ones; or on , one side, two first parallel feathered edges and either , on the same side or on the other side two second , parallel feathered edges that are perpendicular to the first ones, the said other parallel feathered edges having a width of between 100 and 200 mm; or on one , side, two first parallel feathered edges and either on , the same side or on the other side two second parallel , feathered edges that are …
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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 May 21, 2004 and granted February 19, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 21, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 21, 2026.
- 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.