A method of inhibiting the formation of crystalline mineral deposits in soil
CA 2184487 C · Owner: Prindle, Joyce · Inventors: Iverson, Thomas, Jr.; Prindle, Joyce
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides an improved method for growing a plant in soil while irrigating the soil with water which contains deposit forming minerals, According to the present invention an effective amount of 1-hydroxyethane 1,1-diphosphonic acid (HEDPA) is admixed with irrigation water and applied to the soil in which the plant is growing.
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 November 8, 1994 and granted January 11, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 8, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 8, 2016.
- 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.