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Expired Canadian patentCanada

Amidines

CA 1090820 A · Owner: Ciba-Geigy Ag · Inventors: Durr, Dieter; Beriger, Ernst; Rufenacht, Kurt

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Abatract of the Disclosure, Carbimidocarbonylphenylformamidlnes of the formula whereln each of R1 to R6 represents hydrogen halogen, C1-4alkyl, C1-C4alkoxy, trifluoromethyl or cyano a, process for their production and their use in pest control.

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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 2, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 2, 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.
FiledJanuary 10, 1978
GrantedDecember 2, 1980
Term endedDecember 2, 1997
Patent numberCA 1090820 A
Classification (IPC)C07C275/56 +1 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedJan 10, 1978Patent grantedDec 2, 1980Term endedDec 2, 1997

Sources & verification

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