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Expired Canadian patentCanada

Quaternary ammonium and benzothiazole microbicidal preservative composition

CA 1289470 C · Owner: Ito, Yosuke · Inventors: Nomura, Yasuhiro; Katayama, Sakae; Ito, Yosuke

CIPO record

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Abstract From the Canadian patent

A composition comprising a quaternary ammonium compound and 2-(thiocyanomethylthio)benzothiazole. The composition can be useful as a microbicide and preservative for preventing the deterioration of various types of industrial raw materials and products by inhibiting the growth of microorganisms.

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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 September 24, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 24, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 9, 1987
GrantedSeptember 24, 1991
Term endedSeptember 24, 2008
Patent numberCA 1289470 C
Classification (IPC)A01N43/78

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedDec 9, 1987Patent grantedSep 24, 1991Term endedSep 24, 2008

Sources & verification

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