Acoustic chamber
CA 2206885 C · Owner: Ewanek, Nester · Inventors: Ewanek, Nester
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An acoustic chamber for a compressor, wherein the compressor has a cooling fan and a fan opening. The acoustic chamber has a floor a ceiling, and first and second side walls defining first and, second ends of the chamber one of the ends being open, for flow of air into the chamber. An acoustic choke at the second end faces the open end of the chamber and extends between the first and second side walls and between the floor and ceiling. An acoustic channel disposed adjacent the open end of the chamber directs sound in a channelling direction from the open end of the chamber towards the acoustic choke. The floor ceiling and first and second side walls have sufficient permeability to permit …
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 June 3, 1997 and granted January 8, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 3, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 3, 2019.
- 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.