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Expired Canadian patentCanada

Process for preparing cyclohexanecarboxylic acid

CA 1111862 A · Owner: Hisamitsu Pharmaceuticals Co. Inc. · Inventors: Hachiya, Terumi; Yamagata, Kenji; Noda, Kanji

CIPO record

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Abstract From the Canadian patent

The present invention relates to the process for preparing cyclohexanecarboxylic acid of the following formula (I). (I) The compount of the formula (I) which is obtained by the process of the present invention is entirely novel one which has never been in any printed publications possessing, a high degree of pharmacological activities such as anti-allergic, anti-inflammatory, anti-ulcerative antibacterial, anti-, thrombotic and liver-function-impraving activities. Therefore this compound is useful as medicines. Besides this compound is surface-active and, therefore useful as additives for toothpaste and shampoo as surface, active agents for detergents dispersing agents, emulsifying, agents …

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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 November 3, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 3, 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.
FiledApril 13, 1978
GrantedNovember 3, 1981
Term endedNovember 3, 1998
Patent numberCA 1111862 A
Classification (IPC)C07C61/08 +1 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedApril 13, 1978Patent grantedNov 3, 1981Term endedNov 3, 1998

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