Resonator
CA 2020979 A1 · Owner: Abc Group · Inventors: Sadr, Changize; Georgas, Douglas Jeffrey
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Sound attenuating resonators or mufflers for dealing with various noise frequencies may occupy a large volume in a vehicle engine compartment. A simple, compact resonator for performing the same function includes a generally cylindrical resilient, tubular, plastic body with closed ends an inlet in, one end for connecting the device to an engine air inlet tube and a bellows-type side wall integral with the end walls for expanding and contracting to change the volume of the resonator with changing engine speeds.
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 24, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 24, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 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.