Muffler
CA 1291952 C · Owner: Macaulay, Neil · Inventors: Macaulay, Neil
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A muffling device comprising an internally segmented main body narrowed at the body's ends with a widened midsection. The interior of the body is divided by a series of bell shaped walls extending from the body's midsection to define a first outer chamber surrounding a second inner chamber within the body's upper half, a third chamber extending between the midsection of the body, and a fourth inner chamber surrounded by a fifth outer chamber within the body's lower half. The first chamber communicates with the second chamber by an aperture in the wall separating the two chambers. The second chamber communicates with the fourth chamber by a central passage extending from the second chamber …
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
- Granted November 12, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 12, 2008.
- 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.