Water-reducible dye compositions
CA 2120093 C · Owner: Zimin, Alejandro Sr. · Inventors: Caputo, Peter A.; Zimin, Alejandro Sr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Water-immiscible dyes are mixed with citrus solvents and non-ionic surfactants to form a water-reducible true dye solution containing at least 35 wt% of the water-immiscible dye. The dye solution is dispersible in water and infinitely reducible.
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 March 28, 1994 and granted August 12, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 28, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 28, 2016.
- 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.