Water jet propulsion system for watercraft
CA 2263684 C · Owner: Ishigaki, Eiichi · Inventors: Ishigaki, Eiichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Water jet ejection nozzles (2, 3, 4) different in ejection bore diameter or controllable, of ejection bore diameter are arranged in a vertically spacing manner and fluid paths connected, to the ejection nozzles are provided with open-close valves (6 7, 8) to be , individually, controlled or a water jet ejection nozzle (50; 60) having a controllable ejection bore diameter is, vertically driven for water jet propulsion to be in accordance with a varied draft position of a, vessel.
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 June 18, 1998 and granted April 2, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 18, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 18, 2020.
- 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.