Method for reducing the availability of heavy metal nutrients and the use of cross-linked poly(meth)acrylates in said method
CA 2325490 A1 · Owner: Huttermann, Aloys · Inventors: Zomorrodi, Moitoba; Huttermann, Aloys
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for reducing the availability of heavy metals nutrients in substrates, such as soils. The inventive method is characterized in that the substrates are treated with cross-linked polyacrylates or polymethacrylates. The poly(meth)acrylates can be worked into the soils.
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 March 24, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 24, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 24, 2021.
- 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.