Diesel engine exhaust particle collection device
CA 2187243 C · Owner: Nojima, Kouzaburou · Inventors: Nojima, Kouzaburou
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A diesel engine exhaust particle collection device for collecting, under electrical control, particles 10,10,... in an exhaust from diesel engine is disclosed. The device has a needle electrode 8 having a needle tip 8a for charging up the particles 10,10,... by creating a corona discharge around the needle tip 8a, a collecting electrode 11 for collecting the charged particles 10a, 10a,... by electrostatic force and a high voltage power source 13 for applying prescribed high voltage between the needle electrode 8 and the collecting electrode 11 the high, voltage power source 13 electrically being connected with the needle electrode 8 and the collecting electrode 11.
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 7, 1996 and granted December 9, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 7, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 7, 2018.
- 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.