Expandable window fan
CA 2104886 C · Owner: Duracraft Corporation · Inventors: Wang, Jui-Shang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A window fan having a housing with a bottom wall for mounting on a sill of a window opening a front wall, defining an air outlet, a rear wall defining an air inlet a first side wall joined to the front wall and the rear wall, a second side wall joined to the front wall and the rear wall; and the first side wall defining an elongated opening extending between opposite ends thereof; a blower retained by the housing and activatable to produce air flow between the air inlcl and the air outlet; a partition biased into a recessed position within the housing and movable through the elongated opening in to a projecting position extending between the first end wall and one side of the window …
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 26, 1993 and granted February 11, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 26, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 26, 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.