Automotive exhaust system
CA 2080116 A1 · Owner: Bainbridge, David William · Inventors: Bainbridge, David William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An automotive exhaust system incorporating an insulated exhaust pipe. The insulation is selected so that it is very efficient at relatively low temperatures thereby allowing the, exhaust gases to reach the light-off temperature of the catalytic converter in a short time, and less efficient at high temperatures, thereby maintaining the temperature of the exhaust gases below the level at which aging of the catalytic converter increases.
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, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 7, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 7, 2014.
- 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.