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Expired Canadian patentCanada

Dehydrocyclodimerization process

CA 1270859 C · Owner: Jensen, Robert Hugh · Inventors: Jensen, Robert Hugh

CIPO record

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Abstract From the Canadian patent

IMPROVED DEHYDROCYCLODIMERIZATION PROCESS" ABSTRACT, An improved process is disclosed for the dehydrocyclodimerization of light aliphatic hydrocarbons into aromatic hydrocarbons comprising benzene toluene and, xylenes. Improved per pass conversion and an improved yield structure are obtaind by increasing the relative percentage of xylene which is produced as compared to benzene. This improvement is achieved by recycling benzene and/or toluene recovered from the reaction zone effluent to the reaction zone.

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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 June 26, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 26, 2007.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 29, 1986
GrantedJune 26, 1990
Term endedJune 26, 2007
Patent numberCA 1270859 C
Classification (IPC)C07C2/76 +2 more

Timeline

Timeline From CIPO dates

1987199019931996199920022005Application filedDec 29, 1986Patent grantedJune 26, 1990Term endedJune 26, 2007

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