Apparatus for submerging planting panel into liquid
CA 2297571 C · Owner: Yanohara, Yoshitami · Inventors: Yanohara, Yoshitami
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for submerging a planting panel planted with plants into liquid comprises a tank filled with liquid a planting panel planted with , plants thereon which floats on the surface of the liquid in said tank means for, supplying or discharging said liquid in the tank so that the surface of said liquid, is raised or lowered, and means for temporarily locking said planting panel so as, not to raise it to the liquid surface when said liquid surface and thereby said, planting panel are lowered. Said apparatus makes easy the work for submerging a planting panel into liquid for the purpose of exterminating pests injurious to plants or supplying leaves of plants with liquid fertilizer.
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 February 2, 2000 and granted October 7, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 2, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 2, 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.