Patent Yard Sign in
Expired Canadian patentCanada

Carbostyril derivative

CA 1252469 A · Owner: Otsuka Pharmaceutical Co. Ltd. · Inventors: Tanaka, Tatsuyoshi; Nakagawa, Kazuyuki; Tamada, Shigeharu,

CIPO record

Overview

Drawings and full text

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

Open the CIPO record

Abstract From the Canadian patent

Novel carbostyril derivative and its salt having, excellent platelates aggregation inhibitory effect calcium, antagonism, hypotensive effect and phosphodiesterase inhibitory effect, thus the carbostyril derivative of the present invention is useful as prophylactic or treating agent for thrombosis, circulation improving agent for coronary blood flow such as coronary vasodilator hypotensive, agent and phosphodiesterase inhibitor. Furthermore the, carbostyril derivative of the present invention is featured very weak in the hear rate increasing activity and also in the cardiac muscle contraction increasing activity the, carbostyril derivative is useful agent for curing and treating the heart …

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 April 11, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 11, 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.
FiledSeptember 2, 1983
GrantedApril 11, 1989
Term endedApril 11, 2006
Patent numberCA 1252469 A
Classification (IPC)C07D401/12 +2 more

Timeline

Timeline From CIPO dates

19841987199019931996199920022005Application filedSep 2, 1983Patent grantedApril 11, 1989Term endedApril 11, 2006

Sources & verification

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