Method for regenerating anthraquinone derivatives during a synthesis process of hydrogen peroxide 30 %
CA 2270573 C · Owner: Procatalyse · Inventors: Le Loarer, Jean-Luc; Taxil, Bernard; Nedez, Christophe
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a method for regenerating a working solution for producing hydrogen peroxide 30 % in which the working solution is contacted with aluminium said aluminium being derived from a working by drop coagulation or by extrusion.
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 24, 1997 and granted September 10, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 24, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 24, 2019.
- 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.