Sectional acoustical barrier wall system
CA 2117705 C · Owner: Armtec Limited Partnership · Inventors: Rerup, Hans J.; Rohn, Martin E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An acoustical barrier wall system for use as an external wall acoustical attenuator for sound sources is, disclosed. The wall system comprises a plurality of acoustical barrier panels adapted for vertically stacked co-operating engagement. There are first and second attachment members each having a first end anchored within the main body portion of the acoustical barrier panels and an opposite threaded second end extending outwardly beyond the main body portion. There are first and second upright bracing members each having a, corresponding plurality of attachment member receiving means spaced therealong, the attachment member receiving means being adapted to receive the respective first …
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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 September 20, 1994 and granted February 24, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 20, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 20, 2016.
- 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.