Coal gasification
CA 1077271 A · Owner: Cogas Development Company · Inventors: Friedman, Louis D.; Sacks, Martin E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Coal gasification process in which coal is pyrolyzed at a temperature below 700°C to form aqueous vapors and a char, the char is reacted with steam in a gasification zone to produce carbon monoxide and hydrogen and the vapors are condensed to produce an oil and waste water containing ammonia and phenolic compounds. This waste water is vaporized and substantially all the resulting steam containing ammonia and phenolic compounds is fed to the gasification zone.
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 May 13, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 13, 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.