Double walled heat exchanger
CA 2093767 A1 · Owner: Tam, Raymond Tak-Kwong · Inventors: Tam, Raymond Tak-Kwong
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A heat exchanger has double walls to avoid the risk of contamination between a heat source fluid and a heat sink fluid. The heat exchanger comprises a conductive pipe for passage of a heat source fluid the conductive, pipe having a turbulator therein to maximize heat transfer between the heat source fluid and the conductive pipe, and at least one conductive tube coiled around the conductive pipe for passage of a heat sink fluid therethrough, the tube in heat transfer relationship with the conductive pipe.
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 April 8, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 8, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 8, 2015.
- 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.