Process for the comminution of materials
CA 2022760 C · Owner: Maschinenfabrik Andritz Actiengesellschaft · Inventors: Kappel, Johannes
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 for treating high consistency fibrous materials. The fibrous material a, reaction agent and a carrier gas are contacted in a comminuting zone under a closed system to separate the, fibrous material into smaller segments and react the material with the reaction agent. The segmented fibrous material, reaction agent and carrier gas are passed to a reaction zone for further reaction between the segmented fibrous material and the reaction agent. The process includes separating the reaction agent in a liquid phase from the carrier gas to produce a remaining gaseous fraction including vapors of the reaction agent separating, the gaseous fraction of the reaction …
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 August 7, 1990 and granted October 5, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 7, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 7, 2012.
- 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.