Sound barrier
CA 2393384 A1 · Owner: Water Soundproofing Products Pty Limited · Inventors: Roberts, John Kenneth; Arcus, Kenneth James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a sound barrier (1) including a plurality of elongate panels (2) having first and second ends (3 and 4) each panel (2) , being formed from a shell (5) defining an inner chamber (6) adapted to contain sound attenuating material, said plurality of panels (2) being supportable in a planar configuration by a first support means (7) adapted to engage said first and second ends (3 and 4) respectively. Preferably the shell (5) is constructed from plastic and/or fibreglass and the sound attenuating material is a fluid such as water which may optionally include other materials such as sand, slurry, concrete rubble, mud, etc. Some embodiments include second …
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 7, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 7, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 7, 2022.
- 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.