Resistance adjusting type heater and catalytic converter
CA 2040289 C · Owner: Harada, Takashi · Inventors: Abe, Fumio; Kondo, Tomoharu; Mizuno, Hiroshige
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A resistance adjusting type heater includes a honeycomb structure having a large number of passages at least two, electrodes for energizing the honeycomb structure and a, resistance adjusting mechanism such as a slit provided between the electrodes to heat the gas flowing through the passages formed in the honeycomb structure. A catalytic converter includes a main monolith catalyst and the above-described heater placed upstream of the main monolith catalyst. A catalytic converter includes a honeycomb structure having a large number of passages a catalyst, carried on the honeycomb structure at least two electrodes, for energizing the honeycomb structure and a resistance, adjusting mechanism …
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 11, 1991 and granted September 29, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 11, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 11, 2013.
- 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.