An air-permeable plate for plant cultivation and a method for cultivation of plants utilizing the same
CA 2116428 A1 · Owner: Tanimura, Masashi · Inventors: Tanimura, Masashi; Masuda, Akiyoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An air-permeable plate for cultivation of plants which is formed by combining paper boards treated with a decay-resistant agent using a waterproof adhesive agent thereby providing channels which have contact with the atmosphere, and buried in an area of the medium near the roots of the plants while maintaining the contact of the channels with the atmosphere, in order to provide oxygen to the plants as well as a method for cultivation of plants utilizing such an air-permeable plate.
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 August 25, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 25, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 25, 2014.
- 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.