Sight proof, drainable blade louver assembly
CA 2005606 A1 · Owner: Lentz, Gary J. · Inventors: Almaquer, Michael J.; Lentz, Gary J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sight proof drainable blade louver assembly for use in the wall of a building or other enclosure to permit outside air to enter the building, the louver having a plurality of spaced apart blades arranged between spaced apart vertical jambs of a frame in a vertical stack. Each blade has an upwardly inclined first portion and a second portion which is inclined downwardly from the first portion thus giving each, blade the configuration of an inverted V. The leading or free edge of the first portion has a vertical flange which extends upwardly partly to the blade thereabove and a lip which, extends obliquely from the free edge of the vertical flange partly back to the first portion. The free …
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 December 14, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 14, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 14, 2011.
- 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.