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Expired Canadian patentCanada

1,3-dioxan-5-xl alkanoic acid derivatives

CA 1312084 C · Owner: Brown, George Robert · Inventors: Jessup, Reginald; Brown, George Robert; Brewster, Andrew George

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

The invention concerns novel pharmaceutically useful 1,3-dioxane, alkanoic and alkenoic acid derivatives of the formula I in which the groups at positions 2, 4 and 5 of the 1,3-dioxane ring have cis-relative stereochemistry, Y is ethylene or vinylene n is 1-4, Z, is hydrogen or hydroxy, and X is a pyridine containing group (as defined hereinafter); and the pharmaceutically acceptable salts thereof. The invention also includes processes for the manufacture and use of the acid derivatives as well as pharmaceutical compositions for therapeutic use in one or more of a variety of diseases such as ischaemic heart disease, cerebrovascular disease asthmatic disease, and/or inflammatory disease.

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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 29, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 29, 2009.
  • 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 20, 1988
GrantedDecember 29, 1992
Term endedDecember 29, 2009
Patent numberCA 1312084 C
Classification (IPC)C07D405/06 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedApril 20, 1988Patent grantedDec 29, 1992Term endedDec 29, 2009

Sources & verification

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