Production of conductive carbon black for use in depolarization mases in dry batteries
CA 1069676 A · Owner: Hoechst Aktiengesellschaft · Inventors: Schallus, Erich; Petrell, Jurgen; Dorn, Friedrich W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Conductive carbon black for use in depolarization masses in dry batteries is produced. To this end an, aqueous suspension of carbon black having an AS-number higher than 15 and being obtained by subjecting hydrocarbons, which are liquid at room temperature to thermal, conversion at 1200-2000°C, under 1-80 atmospheres and in, the presence of oxygen or oxygen-containing gas and if, desired, steam, and water-scrubbing the resulting carbon black-containing reaction gas is intimately mixed at 5- 120°C, under 1-20 atmospheres, in liquid phase and for 1-20 minutes with 0.5-10 g, per gram of carbon black of, vaporizable aliphatic or cycloaliphatic hydrocarbons the resulting carbon black is …
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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 January 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 15, 1997.
- 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.