Area separation wall and stud therefor
CA 2109674 C · Owner: National Gypsum Company · Inventors: Menchetti, Robert J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An area separation wall having modified H-studs with a web which includes a center portion perpendicular to the modified H-stud flanges and two side portions which are adjoined to the flanges at an angle of about 600. Gypsum core boards with beveled edges are inserted into the two opposed channels of the modified H-studs with the edges of some of the core boards conforming,to and abutting the side portions of the modified H-studs.
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 November 22, 1993 and granted May 9, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 22, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 22, 2015.
- 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.