Mixtures of pigments
CA 1260477 A · Owner: Ciba Specialty Chemicals Holding Inc. · Inventors: Pfenninger, Johannes; Iqbal, Abul; Babler, Fridolin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Mixtures of pigments, Abstract of the Disclosure The invention relates to a mixture of at least two different pigments of the formula, (I), with the difference lying in the meanings of the radicals A and B in which formula (I) A and B are the same or different alkyl aralkyl, cycloalkyl, carbocyclic or heterocyclic aromatic radicals which mixture of pigments is obtainable by a) reacting 1 mole of a disuccinate with 1.75 to 1.998 moles of a nitrile of the formula ACN and 0.002 to 0.25 mole of a nitrile of the formula BCN or of a mixture of several nitriles of the formula BCN, the radicals B of which are different from A or, b) reacting 1 mole of a lactam of formula (II) or of an enamine of …
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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 September 26, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 26, 2006.
- 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
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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.