Liquid curtain apparatus
CA 2005930 A1 · Owner: Mouallem, Albert N. · Inventors: Mouallem, Albert N.; Mouallem, Albert N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention refers to a liquid curtain apparatus comprising two windowpane blades made from glass or another transparent material paralel to each other and joined along as peripherical edges in order to define an closed inner space therebetween, a container for storing a liquid able of reducing or eliminating the transmission of light and the radiation of heat through said blades said container communicating with said inner space between the blades through an opening at the lower portion of said inner space and, means for transportating said curtain forming liquid from said container to said inner space and backwards, characterized by comprising an opening (12) for the passage of …
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 19, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 19, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 19, 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.