Method for ozone treatment of a liquid phase containing solid particles
CA 2475684 A1 · Owner: L'Air Liquide, Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'Etude Et L'Exploitation Des Procedes Georges Claude · Inventors: Trichet, Alain
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a novel method for ozone treatment of a liquid phase containing solid particles in particular paper pulp. Said method is characterized in that the liquid phase (3) containing 0.5 to 5 wt. % of solid, and the gas containing ozone are introduced in cocurrent into a tubular reactor (T).
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 February 12, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 12, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 12, 2025.
- 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.