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Expired Canadian patentCanada

Acyclic, alicyclic and aromatic n-substituted halo-substituted 2-pyrrolidinones and their utility as herbicides

CA 1076588 A · Owner: Stauffer Chemical Company · Inventors: Teach, Eugene G.

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Abstract From the Canadian patent

Abstract of the Disclosure, Acyclic, alicyclic N-substituted halo-2-, pyrrolidinones having the formula in which Q is oxygen or sulfur; R is lower alkyl, haloalkyl, alkenyl, cycloalkyl, cycloalkylalkyl, benzyl and chlorobenzyl; X is hydrogen or chlorine, Y is chlorine or bromine and Z is chlorine or bromine, provided that when R is allyl, Y and Z are each chlorine or bromine, and provided that when R is cyclohexyl, X is other than chlorine; and monocyclic aromatic N-substituted halo-2-, pyrrolidinones having the formula in which X is hydrogen, chlorine or methyl; Y is hydrogen, chlorine or bromine, Z is chlorine or bromine; R2 is alkyl or hydrogen; R is hydrogen, alkyl, acetyl, chlorine …

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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 April 29, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 29, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedApril 29, 1980
Term endedApril 29, 1997
Patent numberCA 1076588 A
Classification (IPC)C07D207/26 +2 more

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedApril 29, 1980Term endedApril 29, 1997

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