Method of impregnating hard substances with liquid binding agents, and use thereof
CA 2048916 A1 · Owner: Durr, Herbert · Inventors: Durr, Herbert; Durr, Herbert; Eirich, Walter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A b s t r a c t, A Method of Impregnating Hard Substances with Liquid Binding Agents and Use thereof, A method of impregnating a mixture of granular or powdery hard substances with liquid binding agents or binding agents which are liquefiable on heating is characterised in that during the operation whereby the hard substances are mixedin the mixing chamber a vacuum is produced and the liquid binding agent is added under vacuum conditions to the agitated material to be mixed. This method is expediently used to produce starting mixtures for the production of electrodes or carbon brushes or to produce mixtures of hydraulic binding agents with admixture substances.
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 9, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 9, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 9, 2013.
- 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.