Method of producing chlorine dioxide
CA 2232209 C · Owner: Akzo Nobel Nv · Inventors: Tenney, Joel
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 process of producing chlorine dioxide by the reduction of chlorate ions with hydrogen peroxide as a reducing agent in a tubular reactor preferably, in the presence of a mineral acid wherein the preferable degree of chlorate conversion to chlorine dioxide in the reactor is above about 75% preferably from about 80 to 100%.
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 16, 1998 and granted November 28, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 16, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 16, 2020.
- 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.