Acoustically resistive multi-component layer for a sound attenuation panel and panel so obtained
CA 2425364 C · Owner: Buge, Michel · Inventors: Rambaud, Eric; Buge, Michel; Andre, Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a multi-component acoustically resistive layer for acoustical attenuating panels having a cellular core (1) flanked on the sound wave arrival side by an acoustical damping layer (2) and on the opposite side, by a rear reflector (3) characterized in that it comprises a first structural component (4) in contact with the aerodynamic flow and formed by at least one layer of fibres bound by a suitable resin and oriented in the direction of aerodynamic flow the said component (4) comprising a suitable quantity of open surface; a dissipating component (6) disposed against the surface of the first component (4) opposite the flow formed by a metallic cloth; and a second …
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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 April 15, 2003 and granted April 5, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 15, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 15, 2025.
- 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.