Process for the production of high grade carbonaceous binders
CA 1159787 A · Owner: Rutgerswerke Aktiengesellschaft · Inventors: Stadelhofer, Jurgen; Kohler, Helmut; Louis, Heinrich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is described for the production of high grade carbonaceous binders, wherein an aromatic high grade carbonaceous material is produced from 5 - 40% by weight of reduced or low ash coal or similar carbon containing raw materials by treatment with 20 - 80% by weight of high-boiling aromatic solvents derived from, coal, and 15 - 50% by weight of high-boiling aromatic solvents, derived from mineral oil, at temperatures of 300 - 420°C and for a reaction period of 1 - 4 hours at a reaction pressure of up to 50 bar and is optionally, freed from low-boiling components.
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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 3, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 3, 2001.
- 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.