Hydroponic plant cultivation device
CA 1233643 A · Owner: Dainichi Sangyo K.K. · Inventors: Tokoro, Toranosuke
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
SPECIFICATION, Abstract of the Disclosure A hydroponic plant cultivation device is disclosed wherein at, least one rotating cultivation tower is arranged. The tower is formed by piling up a plurality of cultivation unit each of which, has a plurality of ports for allowing to receive and maintain a lower end of a plant to be cultivated, a nozzle for spraying a nutrient liquid therein, and a portion for accommodating a constant amount of the liquid to allow an overflow of any excess liquid to a lower cultivation unit. The nutrient liquid is measured on and adjusted in its concentration and pH and recycled between the tower and its supply source.
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
- Granted March 8, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 8, 2005.
- 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.