Stabilised opaque form of c.i. pigment yellow 74
CA 1184704 A · Owner: Ciba Specialty Chemicals Holding Inc. · Inventors: Hamilton, Alexander; Maclennan, Alexander H.; Newton, Christopher
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Stabilised opaque form of C.I. Pigment Yellow 74 Abstract of the Disclosure, A stabilised opaque form of C.I. Pigment Yellow 74 comprises a mixture of a) 99.0 to 80.0 wt.% of the opaque form of Colour Index Pigment Yellow 74 2-methoxy-4-nitroaniline ? acetoacetic-2anisidide, and, b) 1.0 to 20.0 wt.% of a different monoazo yellow pigment based on acetoacetic-2-anisidide. These pigment products are distinguished by improved storage stability when incorporated into a applicational media.
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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 April 2, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 2, 2002.
- 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.