Muffler of industrial engine
CA 2023946 C · Owner: Kato, Tomiya · Inventors: Kato, Tomiya; Kobayashi, Yoshio; Sato, Toru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The known muffler of an industrial engine in, which a channel communicating with an exhaust gas outlet is integrally formed on the inside of a muffler main body made of an aluminium diecast, and an inner lid is mounted to the open side of the channel to form an exhaust gas passageway serving also as a tail pipe within the muffler, main body as disclosed in Japanese Utility Model Application No. 63-127369 (1988) is improved. The improvements reside in that a cross-section area of the channel is reduced gradually or in a stepwise manner from its inlet towards the exhaust gas outlet so as to prevent carbon from adhering to the exhaust passageway and in that at, the exhaust gas outlet is formed …
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 August 24, 1990 and granted March 1, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 24, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 24, 2012.
- 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.