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Expired Canadian patentCanada

Oxidant detergent containing stable bleach activator granules

CA 1324558 C · Owner: Strand, Bruce B. · Inventors: Deleeuw, David L.; Brodbeck, Kelly J.; Strand, Bruce B.

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Abstract From the Canadian patent

of the Invention, The present invention provides stable bleach activator granules comprising:, a) a peroxygen bleach activator having the structure: , wherein R is C1-20 branched or straight chain alkyl, alkoxylated alkyl, cycloalkyl, alkenyl aryl, substituted aryl, alkylaryl; R' and R" are independently H, C1-4 alkyl, aryl; and L is a leaving group;, b) a pliable binding material selected from materials having a melting completion temperature of greater than about 40°C; and, optionally c) a filler material. These bleach activator granules are combined with a detergent base which contains an oxidant bleach to provide an activated oxidant detergent composition.

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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 November 23, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 23, 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 15, 1989
GrantedNovember 23, 1993
Term endedNovember 23, 2010
Patent numberCA 1324558 C
Classification (IPC)C11D3/39 +1 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedJune 15, 1989Patent grantedNov 23, 1993Term endedNov 23, 2010

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