Method and apparatus for hydroponic cultivation
CA 1304580 C · Owner: Nutrient Film Technology Ltd. · Inventors: Edwards, Cyril K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method and apparatus for hydroponic cultivation" A method of growing a plant hydroponically wherein nutrient solution is drawn by surface tension from a nutrient supply and conveyed to the root system of said plant by a layer of hydrophilic material, said nutrient solution passing at least intermittently in one direction across said root system thereby removing exudates from said root system to a collecting area while supplying said plant's requirements for nutrients and water.
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 July 7, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 7, 2009.
- 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.