Leukotriene antagonists
CA 1329613 C · Owner: Dillard, Robert Delane · Inventors: Dillard, Robert Delane; Carr, Francis Patrick; Mccullough, Doris Elfriede
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention provides benzene derivatives of the Formula I, I, wherein:, R1 is hydrogen C1-C6 alkyl, C3-C8 cycloalkyl, phenyl-substituted-(C1-C3 alkyl) phenyl, or phenyl substituted with a halo C1-C4 alkyl, or C1-C4 alkoxy functionality; R2 is C1-C10 alkyl, C2-C6 alkenyl, benzyl or, 2-phenylethyl;, R3 is hydrogen, bromo or chloro;, Z is -O-, -NR-, or , ;, A is -O- , -NR-, , -CHOR- or, straight or branched chain C1-C4 alkylidene; each p is independently 0, 1 or 2;, Q is a bond or straight or branched chain C1-C4 alkylidene;, R4 is COR9, 5-tetrazolyl, 3-(1,2,5-thiadiazolyl) or -CN; where, each R is independently hydrogen C1-C3 alkyl or, C1-C4 alkanoyl;, each R5 and R6 is independently …
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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 17, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 17, 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.