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Expired Canadian patentCanada

Dihydroorotic acid derivative and processes for preparing the same

CA 1248698 A · Owner: Tanabe Seiyaku Co. Ltd. · Inventors: Sugano, Hiroshi; Yamamura, Michio; Ishida, Ryuichi

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

Abstract:, The invention provides 1-methyl-4,5-dihydroorotylhistidyl-prolinamide and pharmaceutically acceptable acid addition salts thereof, processes for the preparation of these compounds and pharmaceutical compositions containing them. The prolinamide and the pharmaceutically acceptable acid addition salts thereof are useful for the treatment of central nervous system disorders.

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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 10, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 10, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 10, 1985
GrantedJanuary 10, 1989
Term endedJanuary 10, 2006
Patent numberCA 1248698 A
Classification (IPC)C07K5/08 +1 more

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedJuly 10, 1985Patent grantedJan 10, 1989Term endedJan 10, 2006

Sources & verification

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