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Expired Canadian patentCanada

Aqueous solution of aromatic percarboxylic acids

CA 1319581 C · Owner: Sterling Drug Inc. · Inventors: Bielfuss, Wolfgang; Diehl, Karl-Heinz

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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 relates to an aqueous solution of aromatic percarboxylic acids which have been stabilized with a) at least an equal amount of the aromatic carboxylic acid corresponding to this percarboxylic acid and, b) an aqueous solution of perglutaric acid stabilized with (i) an excess of H2O2, or 10% to 60% strength solution of H2O2;, and to the use thereof as disinfectants oxidizing agents and/or, bleaching agents.

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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 29, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 29, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 14, 1988
GrantedJune 29, 1993
Term endedJune 29, 2010
Patent numberCA 1319581 C
Classification (IPC)D06L4/00 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedJune 14, 1988Patent grantedJune 29, 1993Term endedJune 29, 2010

Sources & verification

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