Muffler with gas-dispersing shell and sound-absorption layers
CA 2307559 C · Owner: Flugger, Ray T. · Inventors: Flugger, Ray T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A muffler assemby (10) includes an elongated casing (15) having an inlet opening (12), an outlet opening (13), and a partition assembly including a conically converging, perforated, dispersion shell (33) and a transversed wall (45). A perforated retaining shell (17) is provided positioned internally of the casing radially outwardly of the dispersion shell (33). An outer fiberglass layer of material (20) is positioned in the cavity (18) between the casing wall (15) and the retaining shell (17) and an inner ceramic layer of , thermally insulating material (21) is positioned in the cavity (18) to thermally insulate the fiberglass layer (20) from the hot exhaust gases.
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 November 3, 1998 and granted August 5, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 3, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 3, 2020.
- 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.