Sound absorbing panel
CA 2330199 A1 · Owner: Wang, Chao Hsiang · Inventors: Wang, Chao Hsiang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sound absorbing panel comprises a frame a panel, and a plurality, of large and small sound absorbing barrels. The panel is formed with a plurality of adjacent tapered holes. The sound absorbing barrel has a tapered shape or a round cylinder. The frame is rectangular frame; the frame having a bottom plate; and a plurality of concave seats are installed therein. Therefore, the plurality of sound absorbing barrels are arranged on the concave seats and then they are combined by high frequency welding. Then a lid is covered thereon to be formed as a sound absorbing panel in order to remove undesired noise.
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 January 4, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 4, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 4, 2023.
- 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.