Composite structural member
CA 2248147 C · Owner: National Gypsum Properties Llc · Inventors: Menchetti, Robert J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This disclosure relates to a composite structural member (60) comprising a body part (61) and multiple rigid strips (62) which are attached to and separated by the body part (61). The body part (61) is formed by a core having substantially flat parallel sides and opposed edges and the opposed edges are , covered by the rigid strips (62). As an example the core is made of gypsum, and the strips are made of sheet metal. The rigid strips (62) enable screw fasteners to be secured to the structural member. The sides of the core are preferably covered by backing sheets.
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 March 3, 1997 and granted January 22, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 3, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 3, 2019.
- 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.