Latch mechanisms
CA 2004983 C · Owner: Carroll, Terence John · Inventors: Carroll, Terence John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A latch bolt assembly and a locking device for use in a latch mechanism which can be fitted to a door or the like. The latch bolt assembly includes a casing and a bolt device which is receivable within a guide passage in the casing for movement between latched and retracted positions. A biasing spring is disposed between co-operating stops on the casing and the bolt device so as to normally urge the bolt device towards the latched position. The locking device comprises a locking element movable between a lock position and a release position and a control member which controls movement of the locking element and an actuating member which causes movement of the control member.
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 December 8, 1989 and granted February 2, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 8, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 8, 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.