Polyacrylamide soil modifiers enhanced with nutrients
CA 2105831 A1 · Owner: Miller, Edward Elliot · Inventors: Miller, Edward Elliot
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process of profile modifying and revegetating permeable soils with an environmentally safe nutrient enhancing composition of a non-toxic water-soluble polymer, a redox couple of a water-soluble ferrous salt and a non-toxic, oxidizing agent and an effective amount of an agricultural nutrient which are mixed in water and applied to a subterranean or soil surface formation wherein ferrous ion is oxidized to ferric ion to gel the polymer making the subterranean or soil surface formation impermeable.
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 September 9, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 9, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 9, 2015.
- 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.