Method for air conditioning and supplying hot/cold water
CA 2029445 A1 · Owner: Union Kogyo Kabushiki Kaisha · Inventors: Matsuura, Takaaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for conditioning air and supplying hot or cold, water including the steps of circulating a refrigerant from a compressor through a condenser, expansion valve and evaporator and, then back to a compressor. The method further includes the steps of generating heat or providing a heating effect by the refrigerant in the condenser; heating a first fluid by the generated heat or heating effect in the condenser; absorbing heat or providing a cooling effect by the refrigerant in the evaporator; cooling a second fluid by the absorbed heat or cooling effect in the evaporator; circulating the first fluid heated by the heating step; circulating the second fluid cooled by the cooling step; …
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 November 7, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 7, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 7, 2012.
- 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.