Poly(oxyalkylene) modified phthalocyanine colorants
CA 2017115 C · Owner: Milliken & Company · Inventors: Moody, David J.; Kluger, Edward W.; Rekers, John W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Colorants and and polymeric resinous compositions containing the same, including polymeric substrates especially polyurethane foams which are tinted or deeply colored with one or a mixture of the colorants which have the general formulae, A1-SO2-N(R2)-Y1-4 A2-D-Z-SO2-N(R2)-Y1-16, or, (see formula I) wherein: R2 is selected from hydrogen or unsubstituted or substituted alkyl, cycloalkyl, aryl or Y; each of A1 A2, and A3 is a nonionic metallophthalocyanine chromophore which can be substituted or unsubstituted; Z is an arylene moiety; each D or D' is selected from a covalent bond or a linking group consisting of or containing at least one of -O- -S-, -N(R3)-, or -N(SO2R4)-as the linking moiety …
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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
- Filed May 18, 1990 and granted October 16, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 18, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 18, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.