Inner valves for fish cage
CA 2374254 A1 · Owner: Kolberg, Dag · Inventors: Kolberg, Dag
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fish cage having one or more air-tight buoyancy rings (1) being entirely or partially hollow, with water valves (20) for inlet and outlet of water and , air valves (3) for injection and outlet of air and preferably with closing , shot plates (2) in the buoyancy ring (1). The novel feature according to the invention is that at least one or more of the air valves (3) and preferably , also the air valves (20) are arranged inside of the buoyancy ring (1) so that the air valves (3) and water valves (20) are protected from external mechanical influence.
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 May 30, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 30, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 30, 2022.
- 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.