Tilt lock for double-hung windows
CA 2098554 C · Owner: Dallmann, Mary B. · Inventors: Dallmann, Mary B.; Stormo, Guy C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A latch for selectively connecting a sash of a double-hung window to a slide track in a window frame is provided including a lever including a gear at one end, a latch housing mountable to the sash the housing including means for pivotally supporting the lever, and a locking member movable between a locked position securing the sash to the track and an unlocked position releasing the sash from the track. The locking member includes a tongue projecting from the latch housing when the tilt latch is in the locked position and lying within the latch housing when the tilt latch is in the unlocked position and a rack engaging the lever gear to move the locking member to locked and unlocked …
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 16, 1993 and granted March 24, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 16, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 16, 2015.
- 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.