Plant watering system
CA 2069271 A1 · Owner: Smith, James K. · Inventors: Lothian, Michael T.; Lothian, Michael T.; Smith, James K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
32 -, "Plant Watering System", Abstract An insert 16 of a water-permeable material such as brick, stone, wood, or a porous plastics material is, used in a subirrigation system for plant to control the rate of flow of water through a hollow member 12 which is packed with a water-permeable material such as sand gravel, cultivation medium or a fibrous material and, which connects a reservoir 7 with the cultivation medium 6 to be irrigated.
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 May 22, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 22, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 22, 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.