Method of treating water containing fertilisers
CA 2005970 A1 · Owner: Harris, Arthur · Inventors: Harris, Arthur
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Case A-17380/+/MA 1950, Abstract of Disclosure Method of Treating Water Containing Fertilisers The invention provides a method for preventing or reducing the blocking of holes or emitters or other components in a drip, trickle or mini sprinkler irrigation system through which irrigation water containing a fertiliser is applied which comprises adding to the irrigation water 0.1 to 100 ppm, based on the feed water, of at least one anionic compound having threshold properties towards alkaline earth metal salts, the anionic compound being a homo- or co-polymer of acrylic or methacrylic acid a copolymer of, maleic anhydride or an organophosphorus compound or a, water-soluble salt of such a …
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 December 19, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 19, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 19, 2011.
- 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.