Window safety system
CA 1072821 A · Owner: Kawneer Company · Inventors: Hubbard, S. Eugene
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed in combination, a window frame including interconnected pairs of opposite, spaced parallel frame members defining a sash, receiving opening; a sash mounted in the opening for pivotal movement about a sash pivot axis extended transversely between opposite members of one of the pairs of the frame members between a closed open and a reverse position, relative to the frame and a releasable latch assembly positioned apart from the axis between the axis and a frame member parallel thereto at an adjustably selected spacing therebetween. The latch assembly interconnects one of the frame members transverse to the pivot axis and the sash for limiting the amount of initial pivotal …
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
- Granted March 4, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 4, 1997.
- 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.