Carbonising of materials
CA 2122238 A1 · Owner: Robertson, Struan G. · Inventors: Packer, Leslie J.; Robertson, Struan G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for use in the production of carbonised material comprising: a retort having a carbonising zone therein; a delivery inlet for delivering material to be carbonised to said carbonising zone; a discharge outlet for discharging material from said carbonising zone; an activation zone for receiving material from said carbonising zone via said discharge outlet said zones being arranged so that when in use material can pass therethrough on a continuous basis; and means for heating said carbonising zone and said activation zone.
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 October 30, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 30, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 30, 2014.
- 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.