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Expired Canadian patentCanada

Method of forming hypobromous acid in aqueous system

CA 2579963 C · Owner: Nishi, Zenichi · Inventors: Kudoh, Koichi; Nishi, Zenichi; Okamoto, Naoya

CIPO record

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Abstract From the Canadian patent

A method which especially can safely produce a hypobromous acid or a water-soluble salt thereof, that does not require expensive equipment or the like, does not involve extra work such as pre-mixing or have restrictions such as producing immediately prior to use and is , simple. Further, a method which can efficiently and rapidly form a hypobromous acid or a water-soluble salt thereof which is stable and has high sterilization/anti-microbial effect and which does not form , harmful bromic acid. At least either a hypobromous acid or a water-soluble salt thereof is formed by reacting at least either a hypochlorous acid or a water-soluble salt thereof with a bromide in a liquid to be …

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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

  • Filed November 22, 2004 and granted September 18, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 22, 2024.
  • Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 22, 2004
GrantedSeptember 18, 2012
Term endedNovember 22, 2024
Patent numberCA 2579963 C
Classification (IPC)C02F1/50

Timeline

Timeline From CIPO dates

2005200720092011201320152017201920212023Application filedNov 22, 2004Patent grantedSep 18, 2012Term endedNov 22, 2024

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