Barrier, in particular for damming a tidal waterway during storm tides
CA 2075369 C · Owner: Noell Gmbh · Inventors: Kruger, Heinz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The storm tide flood barriers of the prior art for damming tidal surges have the particular disadvantages of expensive construction, a modification of the river cross section complex, and expensive methods to keep them clear of sand and silt deposits, and difficult service and maintenance. It must also be possible to maintain a continuous ship channel at least 200 to 400 m wide with sufficient depth at average low water. The barrier proposed by the invention consists of gate elements or components (1a-1d) which move on inclined planes (22) characterized by the fact that in the rest position on the edge of the waterway, preferably on the shore the gate elements of, components can be inserted …
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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 January 24, 1991 and granted January 6, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 24, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 24, 2013.
- 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.