Dye mixtures and their use in trichromatic dyeing processes
CA 2026959 C · Owner: Clariant Finance (Bvi) Limited · Inventors: Dore, Jacky
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A combination of three components, at least one yellow dyestuff of formula Ia, optionally together with at least one yellow to orange dyestuff of formulae Ib to Ie, together with at least one dyestuff of formulae II and III which dyestuffs are as defined in the specification gives a well-balanced trichromatic mixture which is most suitable, for the trichromatic dyeing or printing nitrogen containing organic substrates, especially natural or synthetic polyamides using, conventional dyeing or printing processes.
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
- Filed October 4, 1990 and granted February 13, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 4, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 4, 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.