Multiflow pressurized deinking apparatus
CA 2286292 A1 · Owner: Hebert, Richard P. · Inventors: Grimes, David B.; Hebert, Richard P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mixture of air and paper stock (36) made from recycled paper from which the ink particles have been chemically released is injected into a cylindrical processing vessel (22). Added surfactants create a foam (40) from the air as it rises through the stock (36) and cause the ink particles to adhere to the air bubbles, resulting in a foam containing a concentrated fraction of the ink particles with some included fibres. The foam rises to the top (43) of the vessel (22), and carries with it ink particles. Additional air injection ports (53) can be used to increase the amount of foam generated and the amount of ink removed. Flow of stock (36) and foam (42) from the vessel (22) can be …
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 17, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 17, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 17, 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.