Universal window sash lock for a variety of windows
CA 2050040 C · Owner: Tucker, Daniel G. · Inventors: Tucker, Daniel G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A universal lock for securing any of a variety of different design window sashes closed against any of a variety of different design window frames. The lock includes a pair of spaced keepers on the window sash and a, tie bar mounted to the window frame and having a pair of rollers thereon. The tie bar is reciprocable along its axis to selectively move the rollers into or out of engagement with the keepers of the closed window sash to selectively lock or release the sash from the frame. A base pivotally mounts a handle member to the window frame. A coupler link is pivotally secured at one end to the handle member and has a flange at the other end pivotally secured to the tie bar. The flange …
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 August 27, 1991 and granted February 4, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 27, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 27, 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.