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Expired Canadian patentCanada

Choline salts of arylmethylenyl thiazolidinones and oxazolidinones

CA 1340247 C · Owner: Sorenson, Roderick Joseph · Inventors: Sorenson, Roderick Joseph; Connor, David Thomas; Unangst, Paul Charles

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

The present invention is for selected novel compounds as well as, pharmaceutical compositions and methods of use for known and the selected novel compounds both of the formula (see fig. I), having activity useful for treating allergies and inflammation.

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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 December 15, 1998. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 15, 2015.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 24, 1989
GrantedDecember 15, 1998
Term endedDecember 15, 2015
Patent numberCA 1340247 C
Classification (IPC)C07D233/66 +2 more

Timeline

Timeline From CIPO dates

199019931996199920022005200820112014Application filedMay 24, 1989Patent grantedDec 15, 1998Term endedDec 15, 2015

Sources & verification

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