Tension latch
CA 2055360 C · Owner: Nielsen, Raymond A. · Inventors: Rooney, Dennis J.; Nielsen, Raymond A.; Meiste, Cordell E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A latch incorporates a latch member in the form of a leaf spring which is connected by an overcenter operating lever mechanism to a case mounted to a door for latching engagement with a strike member mounted to another door or frame member. The strike member incorporates guide rails for guiding the latch member into engagement with the strike and, the case includes flanges which cover the shackle of a padlock used to lock the operating lever to the case in a latching position.
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 13, 1991 and granted August 27, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 13, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 13, 2013.
- 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.