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Expired Canadian patentCanada

Substituted heteroaryl fungicides

CA 1256435 A · Owner: Chevron Research And Technology Company · Inventors: Spatz, David M.

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 provides novel substituted heteroaryl compounds of formula, In typical compounds of the inventlon R is halo-substituted phenyl, X is sulfur or oxygen or a direct bond Z is oxygen or, sulfur, R1 is lower alkyl and R2 is a nitrogen-containing heterocyclic ring. The compounds are good fungicides. In particular, they possess especially good activity against Bean Powdery Mildew.

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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 June 27, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 27, 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.
FiledNovember 3, 1983
GrantedJune 27, 1989
Term endedJune 27, 2006
Patent numberCA 1256435 A
Classification (IPC)C07D213/81 +2 more

Timeline

Timeline From CIPO dates

19841987199019931996199920022005Application filedNov 3, 1983Patent grantedJune 27, 1989Term endedJune 27, 2006

Sources & verification

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