Floating barrier
CA 2045582 A1 · Owner: Sandkvist, Jim · Inventors: Sandkvist, Jim; Tuner, Kjell; Thorell, Dan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
57)Abstract, The invention relates to an elongated floating barrier for use in controlling and concentrating floating on a liquid surface, preferably oil floating on a water surface. The barrier comprises a front shield towards the front surface (2) of which the substances are deposited and transported sideways along the shield as the barrier is moved relative the liquid surface. The front shield is inclined in such a way that its upper edge (5) is abaft its lower edge (6) and a lowering means (4) is attached to the lower edge of the shield and arranged to give a mainly horizontal pull in the barrier when it is moved relative the water surface. The deep-going of the front shield and its …
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 January 19, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 19, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 19, 2012.
- 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.