A noisescreen
CA 2308403 A1 · Owner: Rockwool International A/S · Inventors: Rask, Steen Erik; Falk, Johannes
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A noisescreen comprising two rows (1, 2) of live essentially vertical tree , stems or branches (3) set in a growth medium and a layer of a soundproofing , material disposed between the rows (1 2), and being composed of one or more noisescreen elements comprising two layers of live tree stems or branches (3) and a layer of mineral fibre batt or mat (6 7, 8, 9) positioned between these , layers where the layers (1, 2) of live tree stems or branches at their lowermost ends (4) have greater extent than the layer of soundproofing material, where the layers (1, 2) of tree stems or branches by the layer of soundproofing material are kept together by means of interconnected laths (10) …
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 October 27, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 27, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 27, 2020.
- 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.