Process for removing inorganic components that form ash on ignition and oily waste from paper during recycling
CA 2135826 C · Owner: Cody, Charles A. · Inventors: Magauran, Edward D.; Cody, Charles A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for treating wastepaper to remove oily waste and inorganic components, which comprises: (a) forming an organoclay treating composition in a wastepaper aqueous system: (b) contacting the wastepaper aqueous system with an amount of the organoclay effective to remove from the wastepaper oily waste and inorganic components; and (c) recovering paper pulp from the aqueous system. The process is effective in wastepaper treatment systems using both air flotation removal as well as systems utilizing water-washing processes.
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 November 15, 1994 and granted May 8, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 15, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 15, 2016.
- 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.