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Expired Canadian patentCanada

Nitrogen-containing water-soluble compounds

CA 1313672 C · Owner: Muszik, Janos · Inventors: Schroer, Wolf-Dieter; Suling, Carlhans; Bachem, Henning

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Abstract From the Canadian patent

Nitrogen-containing water-soluble compounds A b s t r a c t, Water-soluble crosslinkable compounds which are obtainable by reaction of reaction products containing, halogenohydrin groups, of ammonia or mono- or polyamines and an epihalogenohydrin or 1,3-dihalogeno-2-hydroxypropane with inorganic bases and subsequent reaction of the resulting compounds, which contain epoxy groups with, halogen-free acids or derivatives thereof to give compounds containing 1-acyloxy-2-hydroxypropyl groups are used for providing paper with a wet-strength finish for, aftertreatment of cellulose dyed with reactive and direct dyestuffs and for finishing wool.

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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 February 16, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 16, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 15, 1988
GrantedFebruary 16, 1993
Term endedFebruary 16, 2010
Patent numberCA 1313672 C
Classification (IPC)C08G65/26 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedMarch 15, 1988Patent grantedFeb 16, 1993Term endedFeb 16, 2010

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