Dry dyestuff powders with enhanced water solubility
CA 1321446 C · Owner: Mobay Corporation · Inventors: Thomas, Thomas J.; Sandefur, Charles W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Mo-3011, VE-015, DRY DYESTUFF POWDERS WITH ENHANCED WATER SOLUBILITY, ABSTRACT OF THE DISCLOSURE The present invention is concerned with improving the solubility of anionic water soluble dyestuff powders. The solubility of these powders particularly in cold water, is enhanced by adding (i) a chelating agent which has at least two free acid groups and (ii) a Lewis base in an amount sufficient to bring the pH of the water solution of the powder to a value of about 7-10. Mo-3011
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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 August 24, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 24, 2010.
- 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.