Method and apparatus for reclaiming refrigerant
CA 2073827 A1 · Owner: Wall, Frank N. · Inventors: Wall, Frank N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A high capacity refrigerant apparatus is made up of a heat exchanger which receives refrigerant from the system to be drained in heat exchange relation to a coolant from a vapor compressor circuit, and a liquid pump discharges the refrigerant from the heat exchanger so long as the liquid refrigerant in the heat exchanger remains at a particular level; otherwise, the refrigerant is drawn through a second vapor compressor circuit and completely condensed prior to discharge. In a modified form a lower, capacity refrigerant reclamation apparatus a recirculating, coolant tube vaporizes a limited amount of refrigerant and returns it back through the heat exchanger so as not to require a separate …
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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 July 14, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 14, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 14, 2014.
- 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.