Process for dry beading carbon black
CA 1332268 C · Owner: Degussa Aktiengesellschaft · Inventors: Vogel, Karl
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is disclosed for dry beading carbon black with, which the quality of the beads can be purposefully influenced and an increase of the throughput of a particular beading apparatus can be achieved. The process foresees that material that is to be beaded is preconsolidated by vacuum prior to or during the beading process. An apparatus for carrying out the single-stage version of the process consists of a beading drum in which filter surfaces that are affected by a vacuum are arranged parallel to the on-going beading process so as to preconsolidate the starting material that is in powder form. In one apparatus, the inner casing of the drum is configured as a filter surface; in the …
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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 October 11, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 11, 2011.
- 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.