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Expired Canadian patentCanada

Production of ethylene

CA 1111075 A · Owner: Hoechst Aktiengesellschaft · Inventors: Glaser, Hermann; Vogt, Wilhelm

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

The invention relates to a process for making ethylene by subjecting a gas mixture containing hydrocarbons, hydrogen, carbon monoxide carbon, dioxide and steam to a hydropyrolysis reaction. More particularly the gas mixture is heated to, temperatures higher than 800° C inside a reaction zone having metal walls. The walls contain aluminum and/or copper in at least their surface portions.

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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 20, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 20, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 21, 1979
GrantedOctober 20, 1981
Term endedOctober 20, 1998
Patent numberCA 1111075 A
Classification (IPC)C07C11/04 +2 more

Timeline

Timeline From CIPO dates

1980198219841986198819901992199419961998Application filedNov 21, 1979Patent grantedOct 20, 1981Term endedOct 20, 1998

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.