A vegetative noise protection device
CA 2213655 C · Owner: Freitag, Karl-Heinz · Inventors: Freitag, Karl-Heinz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vegetative noise protection device comprises two side walls (1, 2), the space between the side walls (1 2) being, filled with a substrate (3). The side walls (1 2) are, erected from wall elements (4) formed by closely adjacent willow branches (5) extending from the top to the bottom and clamped between clamping rods (6, 7) extending in the longitudinal direction of the wall. On the outside of each wall element (4) there are at least two supporting poles (9) protruding into the subsoil (10). The supporting poles (9) on the two side walls (1, 2) are inclined toward each other and interconnected by threaded rods (12). Between the willow branches (5) and the space filled with substrate (3) …
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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 August 19, 1997 and granted June 19, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 19, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 19, 2019.
- 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.