Method and apparatus for maintaining the position of a containment boom in fast flowing waterway
CA 2186179 C · Owner: Envirotech Nisku Inc. · Inventors: Brown, Leonard G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for maintaining the position of a containment boom in a fast flowing waterway. Firstly providing an, elongate containment boom having a first side a second side, a first end, a second end and a longitudinal axis. The containment boom consists of a plurality of smaller substantially coaxial boom sections. Secondly providing a, plurality of floats having floating deflector appendages. Thirdly placing the plurality of floats at spaced intervals along the containment boom between the boom sections with the, floating deflector appendage of each float oriented on the first side of the containment boom extending outwardly at an angle in relation to the longitudinal axis and pointing …
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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 23, 1996 and granted December 21, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 23, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 23, 2018.
- 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.