Lock accessory
CA 2054078 C · Owner: Meszaros, Steve P. · Inventors: Meszaros, Steve P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
For use with a deadbolt lock having an actuating knob, a lock plate and a tailpiece engaging the actuating knob, a lock accessory comprises an intermediate plate for location between the lock plate and a door on which the lock is provided. The intermediate plate has an opening through which the tailpiece extends and a manually actuatable locking member mounted on the intermediate plate for selectively preventing and permitting rotation of the tailpiece. The locking member is displaceable into a first position, in which the locking member is in locking engagement with the tailpiece, and a second position in, which the locking member is displaced out of locking engagement with the tailpiece, …
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 October 23, 1991 and granted December 9, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 23, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 23, 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.