Canadian application, no grantCanada
Process for producing activated charcoal
CA 2102559 A1 · Owner: Del Piero, Gastone · Inventors: Carugati, Angelo; Del Piero, Gastone; Rausa, Riccardo
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PROCESS FOR PRODUCING ACTIVATED CHARCOAL" Abstract, Process for preparing activated charcoal by means of a thermal treatment, in the presence of phosphoric acid, of regenerated humic acids deriving from coal oxidation.
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 5, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 5, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 5, 2015.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 5, 1993
GrantedNo grant recorded
Term endedNovember 5, 2013
Patent numberCA 2102559 A1
Classification (IPC)C01B31/08 +1 more
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.