A modified sorptive lignocellulosic fibre material, preparation and use thereof and method for decontamination of fluid and aqueous media
CA 2591985 C · Owner: Eriksen, Per Berre · Inventors: Larsen, Peter; Lawther, John Mark; Eriksen, Per Berre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A modified sorptive lignocellulosic fibre material with hydroxyl groups on the lignocellu~losic fibres doubly modified by esterification with a combination of monocarboxylic and dicarboxylic acid ester groups. A process for the preparation of the sorptive material. The sorptive fibre material is effective for the removal of oils and other contaminants including heavy metals from a fluid such as contaminated water by a combined sorp~tion of hydrophobic contaminants and ion exchange.
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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 20, 2005 and granted April 30, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 20, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.