Honeycomb regenerator
CA 2263733 C · Owner: Umehara, Kazuhiko · Inventors: Kotani, Wataru; Umehara, Kazuhiko; Kasai, Yoshiyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A honeycomb regenerator for recovering waste heat from an exhaust gas by passing the exhaust gas and a gas to be heated alternately therethrough, which is constructed by stacking a plurality of honeycomb structural bodies is, disclosed. In the honeycomb regenerator according to the invention, cell open rates of the honeycomb structural bodies positioned at the inlet side for the exhaust gas and at the inlet side for the gas to be heated are larger than those of the honeycomb structural bodies positioned at a centre portion.
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 February 26, 1999 and granted January 21, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 26, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 26, 2021.
- 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.