Sash window arrangement
CA 2045653 C · Owner: Sm Canada Inc. · Inventors: Davies, Lawrence W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sash window is formed from a frame profile (20) and a sealed window unit comprising a pair of spaced parallel glass panels (10, 13). The frame profile includes a channel section with a transverse web (22) and upstanding side walls (23, 24) which are formed integrally without separate stops and integrally with a support element (21) for the window frame. The frame profile (20) is manufactured by pultrusion to provide a coefficient of expansion very close to that of glass. The sealed window unit is sealed to the window frame by a bead (32) of sealant material only at the corner between the inner face of the window unit and the transverse web supporting the side edge of the window unit. The …
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 September 28, 1990 and granted March 18, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 28, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 28, 2012.
- 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.