Chain driven door with lock
CA 2207244 A1 · Owner: Dalman, Lew · Inventors: Dalman, Lew
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
25-, A door arrangement for mounting in the opening of a building comprises an upper panel and a lower panel connected for pivotal movement about a horizontal axis at the junction therebetween with the upper panel mounted for pivotal movement about a horizontal axis at the top edge of the panel relative to the building. The door panel is opened by pulling the lower edge of the lower panel upwardly in guide tracks on respective sides of the door panels. The door is locked by a lever projecting from the door panel and engaging an abutment on the ground so as to push the lower door panel in a direction to pivot the common axis of the door rearwardly into the plane of the opening.
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 6, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 6, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 6, 2019.
- 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.