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Expired Canadian patentCanada

Water-dissipatable polyester and polyester-amides containing copolymerized colorants

CA 1323461 C · Owner: Eastman Chemical Company · Inventors: Weaver, Max Allen; Adams, Linda Jane

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Abstract From the Canadian patent

Water-dispersible polymeric material such as polyesters and poly(ester-amides) containing water-solublizing sulfonate groups and having reacted onto or into the polymer backbone from about 0.01 to about 40 mol % based on the total of all reactant hydroxy, carboxy or amino equivalents, of colorant comprising one or more heat stable organic compounds initially having one or more condensable groups the, polymeric material comprising the reaction residues of organic monomers and said colorant compounds containing one or more reactive groups condensable under polymerization conditions. This material is useful, for example, for printing inks or other coatings which are desireably applied from an …

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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 October 19, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 19, 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.
FiledFebruary 3, 1989
GrantedOctober 19, 1993
Term endedOctober 19, 2010
Patent numberCA 1323461 C
Classification (IPC)C08G63/68 +1 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedFeb 3, 1989Patent grantedOct 19, 1993Term endedOct 19, 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.