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Expired Canadian patentCanada

Synergistic compositions containing hydroxypropyl methanethiolsulfonate and methods of using same

CA 1201358 A · Owner: Buckman Laboratories International, Inc. · Inventors: Johnson, Betty S.; May, Oscar W.

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Compositions comprising 2-hydroxypropyl methanethiolsulfonate in combination with a mixture of 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one show synergistic results in controlling the growth and proliferation of microorganisms in aqueous systems.

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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 4, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 4, 2003.
  • 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 25, 1984
GrantedMarch 4, 1986
Term endedMarch 4, 2003
Patent numberCA 1201358 A
Classification (IPC)C02F1/50 +1 more

Timeline

Timeline From CIPO dates

1985198719891991199319951997199920012003Application filedJune 25, 1984Patent grantedMarch 4, 1986Term endedMarch 4, 2003

Sources & verification

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