Compact refrigeration system
CA 2356683 A1 · Owner: Venture Scientifics, Inc. · Inventors: Butsch, Otto R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A selectively controllable valve (106) is arranged in a refrigeration circuit which interconnects the evaporator (102) and the condenser (100) and is controlled so that a pressure differential is built up across the valve (106). The valve (106) is selectively opened to allow "batches" of working fluid to pass therethrough. In some embodiments the working fluid which is allowed to pass through the valve (106), is heated in a chamber (116) to increase the amount of pressure on the downstream side of the valve (106). This produces expanded pressurized working fluid which increases the pressure in the condenser (100) and forces previously condensed and liquefied working fluid through a …
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 21, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 21, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 21, 2021.
- 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.