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Expired Canadian patentCanada

Halogenated hydantoins

CA 1233827 A · Owner: Glyco Inc. · Inventors: Franklin, Lloyd C.; Girard, Theodore A.

CIPO record

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Abstract From the Canadian patent

A halogenated hydantoin product end method of producing same for use as e.g. a bleaching agent or disinfectant comprising a halogenated hydantoin of the formula, wherein R is methyl or ethyl and X1 and X2 which may be the same or different is chlorine or bromine, either as the sole constituent or in sdmixture with halogenated disnethylhydantoins. The products are substantially dust-free, free-flowing and upon compaction form a solid product of high physical integrity.

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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 March 8, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 8, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 11, 1984
GrantedMarch 8, 1988
Term endedMarch 8, 2005
Patent numberCA 1233827 A
Classification (IPC)C07D233/82

Timeline

Timeline From CIPO dates

1985198819911994199720002003Application filedSep 11, 1984Patent grantedMarch 8, 1988Term endedMarch 8, 2005

Sources & verification

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