Heat exchanger
CA 2268706 C · Owner: Kamio, Junichi · Inventors: Tsunoda, Tadashi; Kamio, Junichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In the case where a partition for partitioning a combustion gas passage inlet (11) from an air passage outlet (16) is defined by a plate (8) attached by brazing to end faces of a plurality of heat exchanger plates (S1 S2) in a heat, exchanger (2), durability of the brazed portions are prevented from being degraded due to a load F acting on the plate (8) by a pressure differential between a combustion gas and air. Thus a joint substrate (26) is attached by brazing to the end faces of the heat exchanger plates (S1 S2) with the, front surface of the joint substrate (26) brazed to the rear surface of a joint flange (28), which is formed by bending an end of the plate (8) by right angles, and 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 October 17, 1997 and granted February 4, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 17, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 17, 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.