Hanger for suspended ceiling
CA 2002805 C · Owner: Mi-Di-Su Inc. · Inventors: Rancourt, Pierre J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hanger for holding a suspended ceiling made of a continuous wire. The wire is shaped at one end to form two, superposed loops adapted to surround a screw which is intended to be threaded in a supporting ceiling. The wire is bent near the loops at about 90 degrees relative to the plane of the superposed loops. The short end of the wire is either twisted to the body of the wire or located inside the apex of the angle formed by the loops and the body of the wire so that it will be tightened when the screw is threaded in the supporting ceiling and the body of the wire is under tension.
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 10, 1989 and granted December 31, 1991. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 10, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 10, 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.