Building panel
CA 2287909 C · Owner: Campbell, Norman Wood · Inventors: Campbell, Norman Wood; Costford, David L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This specification discloses a light-weight building panel a building, system incorporating the panels and the process of making them. The process includes a cementitious material in the form of a fibre-reinforced cellular cementitious material which weighs substantially less than regular concrete. Light-weight metal structural members are partially embedded in the cementitious material during the manufacturing of the panel and portions of the, members project therefrom. One embodiment has exposed "C"-shaped channel members that provide, in a wall or floor panel structural surfaces such as , studs or beams ready in place to receive finishing surfaces such as plaster board or dry-, wall …
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 October 29, 1999 and granted February 18, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 29, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 29, 2021.
- 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.