Self-watering air-pruning plant tray system
CA 2073395 C · Owner: Huang, Barney K. · Inventors: Huang, Barney K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention entails a plant growing tray system which includes a tray with a plurality of individual plant cells having an open top and bottom and a detachable screen or perforated bottom. Each tray cell is designed to contain and hold a plant growing medium such as peat cake or peat-soil mix. A detachable bottom secured to the bottom part of the plant tray provides air-pruning of plant roots to grow superior plants and can be conveniently removed from the plant tray for easy removal of the individual plants or seedlings from the tray bottom. Air-pruning of plant roots eliminates root binding or tangling and accelerates root branching resulting in enhanced root branching and …
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 July 8, 1992 and granted September 21, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 8, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 8, 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.