A method of determining the organic content in pulp and paper mill effluents
CA 2202165 C · Owner: Eka Chemicals Ab · Inventors: Renberg, Lars; Sparen, Anders
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method, based on UV/VIS/NIR/IR (including Raman spectroscopy) for the , qualitative and quantitative determination of quality parameters in pulp and paper and/or the organic content in effluents from pulp and paper production by applying chemometric methods.
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 October 10, 1995 and granted October 1, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 10, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 10, 2017.
- 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.