Opposed flow heat exchanger
CA 2214487 C · Owner: Arai, Hidemoto · Inventors: Arai, Hidemoto; Doi, Akira; Akita, Hiroyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An opposed flow heat exchanger comprising partitions including a corrugated portion for forming passages in a wavefront direction, and flat portions for taking in or out air flows from a predetermined direction at opposite ends of the corrugated portion in the wavefront direction; and flat shape holding plates having a length in a direction of the passages which is not longer than a length of the partitions; wherein the partitions and the shape holding plates are alternately layered so that the corrugated portion of each of the partitions and the shape holding plates contact together, and the flat portion of each of the partitions faces to the flat portion of a partition adjacent thereto …
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 September 3, 1997 and granted November 28, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 3, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 3, 2019.
- 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.