Thumb-operated multilatch door lock
CA 2371426 A1 · Owner: Riechmann, Mark E. · Inventors: Riechmann, Mark E.; Davis, Eugene R. Iii
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multipoint lock assembly includes a central latch (20) and at least one remote latch (24) vertically spaced therefrom. The retraction of all the latches is controlled by a central latch driving mechanism (18) in response to a manual operation either of an exterior thumb-operated latch lever (32) or of an interior doorknob (48). A deadbolt (30) is also located proximate the central latch (20). The deadbolt (30) is controlled either by an externally accessed cylinder lock (68) or by a manual rotation of an interior-mounted thumb-turn (70). While the deadbolt (30) is extended the thumb-operated latch , lever (32) and the doorknob (48) are inoperable. At least one of the latches …
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 June 5, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 5, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 5, 2022.
- 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.