Carboxamide derivatives
CA 1329933 C · Owner: Brown, Frederick Jeffrey · Inventors: Brown, Frederick Jeffrey; Yee, Ying Kwong
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Carboxamide Derivatives", This invention provides a series of novel heterocyclic carboxamides of Formula I, I, in which the group -Y-Z< is selected from -C(Ra)=C< -N=C<, and -CH(Ra)-CH< and the other radicals have the meanings defined in the following specification. The compounds of Formula I are leukotriene antagonists. The invention also provides pharmaceutically acceptable salts of the Formula I compounds; pharmaceutical compositions containing the Formula I compound, or their salts, for use in the treatment of for, example, allergic or inflammatory diseases or endotoxic or, traumatic shock conditions; and processes for the manufacture of the Formula I compounds, as well as intermediates …
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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 May 31, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 31, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.