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Expired Canadian patentCanada

Cast detersive systems having a stable halogen source in the presence of readily oxidizable organics

CA 1329102 C · Owner: Olson, Keith E. · Inventors: Olson, Keith E.; Gladfelter, Elizabeth J.; Bull, Sandra L.

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Abstract From the Canadian patent

A general purpose detersive system and detersive system useful in warewashing and in laundry processes have been developed in which highly active encapsulated halogen sources have been incorporated into cast, solid detersive systems containing oxidizable organics that are highly reactive with the active chlorine sources. The stability of the detersive systems thus formulated has been shown to be sufficient to permit the cast materials to be storage stable for a sufficient period to permit the manufacture, distribution, sale and consumption of the cast materials before the availability of either the organic materials or the active halogen drops below an effective level.

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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 May 3, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 3, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 9, 1989
GrantedMay 3, 1994
Term endedMay 3, 2011
Patent numberCA 1329102 C
Classification (IPC)C11D3/39 +1 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedAug 9, 1989Patent grantedMay 3, 1994Term endedMay 3, 2011

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