Exhaust gas filter
CA 2046232 C · Owner: Langer, Hans Joachim · Inventors: Haerle, Hans A.; Langer, Hans Joachim
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An exhaust gas filter, in particular a soot filter for a diesel engine, is provided with a filter body (1) disposed in a housing (2) and through which the exhaust gases to be cleaned flow, having an inlet duct (3, 4) and an outlet duct (5, 6). Between the inlet duct (3, 4) and the outlet duct (5, 6) there is (are) disposed one or several lateral line(s) passing the filter body (1), which at both their ends are connected via apertures (8, 9) to the inlet duct (3, 4) or outlet duct (5, 6) respectively. The cross sections of the inlet duct (3, 4), outlet duct (5 6) and, the lateral line(s) are selected so that in the uncharged condition of the filter body (1) a return flow in the lateral …
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 July 4, 1991 and granted April 30, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 4, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 4, 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.