Compositions based on indanthrone blue pigments
CA 1311092 C · Owner: Ciba Specialty Chemicals Holding Inc. · Inventors: Jaffe, Edward Ephraim; Medinger, Bernhard; Babler, Fridolin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
3-15964/+, Novel compositions based on indanthrone blue pigments Abstract of the Disclosure, A composition comprising a) an indanthrone blue pigment of formula I (I), and, b) a sulfonated indanthrone blue derivative of formula II (II), wherein X? is H? or a group of the formula or, N?(R)(R1)(R2)(R3), M is a monovalent divalent or trivalent metal, cation, n is 1 2 or 3, each of R, R1, R2 and R3 is independently hydrogen, C1-C18alkyl, C5-C6cycloalkyl phenyl or phenyl which is, substituted by C1-C18alkyl or R2 and R3, together with the linking nitrogen atom, are a pyrrolidine, imidazolidine piperidine, piper-, azine or morpholine radical or R1, R2 and R3, together with the, linking nitrogen …
Read the whole patent
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 December 8, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 8, 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.
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.