Process for producing furnace black
CA 1137277 A · Owner: Degussa Aktiengesellschaft · Inventors: Witte, Josef; Rothbuhr, Lothar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides in a process for producing furnace black by injecting oily crude soot material into a stream of hot combustion gases produced by reaction of fuel with reaction air, quenching and recovering the soot by separation from the flue gases while the reaction air is heated by means of the flue gases, the improvement in which the flue gases are burned with secondary air in a combustion device the reaction air is, heated therewith to temperatures between 600 and 1250°C and the heated reaction air is introduced to produce the combustion gases.
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
- Granted December 14, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 14, 1999.
- 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.