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Expired Canadian patentCanada

Catalyst resins for the catalytic reduction of oxygen in aqueous media, the preparation of the catalyst resins, and new catalyst resins

CA 1294947 C · Owner: Thomas, Paul · Inventors: Martinola, Friedrich; Oeckl, Siegfried; Thomas, Paul

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Abstract From the Canadian patent

Catalyst resins for the catalytic reduction of oxygen in aqueous media, the preparation of the catalyst resins and new catalyst resins, A b s t r a c t The invention relates to the use of macroporous weakly-basic anion exchangers, charged with palladium or platinum and based on crosslinked polystyrene as catalysts, for the removal of oxygen from aqueous media by catalytic reduction, a process for the preparation of these catalyst resins, and new macroporous weakly-basic anion exchangers, charged with palladium or platinum and based on crosslinked polystyrene, in which the amino groups are primary or secondary amino groups.

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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 January 28, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 28, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 21, 1987
GrantedJanuary 28, 1992
Term endedJanuary 28, 2009
Patent numberCA 1294947 C
Classification (IPC)B01J31/08 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedMay 21, 1987Patent grantedJan 28, 1992Term endedJan 28, 2009

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