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Expired Canadian patentCanada

Imide-aromatic peroxyacids as bleaching agents

CA 1340680 C · Owner: Ausimont S.R.L. · Inventors: Burzio, Fulvio; Venturello, Carlo; Cavallotti, Claudio

CIPO record

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Abstract From the Canadian patent

A solid or liquid, bleaching or detergent composition comprising as a bleaching agent a compound of general formula:, (see formula I), wherein: A represents a ring derived from benzene or napthalene, or a substituted derivative of the rings; R represents a group selected from H, -OH -COOH, -COOOH, COO-C1-5alkyl, alkyl, substituted alkyl and a mixture thereof; and n is an integer of from one to 5.

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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 July 27, 1999. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 27, 2016.
  • 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 20, 1989
GrantedJuly 27, 1999
Term endedJuly 27, 2016
Patent numberCA 1340680 C
Classification (IPC)C11D3/39 +2 more

Timeline

Timeline From CIPO dates

199019931996199920022005200820112014Application filedJan 20, 1989Patent grantedJuly 27, 1999Term endedJuly 27, 2016

Sources & verification

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