Water-resistant ink formulation
CA 2111723 A1 · Owner: Hoechst Aktiengesellschaft · Inventors: Von Der Eltz, Andreas; Russ, Werner H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Water-resistant ink formulation Ink formulations consisting essentially of a) at least one water-soluble dye, b) at least one fatty alcohol polyglycol ether oxo, fatty alcohol polyglycol ether, alkyl polyglycol ether or ethylene oxide-propylene oxide block polymer or a mixture thereof, and, c) water with or without, d) further, customary additives are suitable for dyeing or printing paper with watersoluble dyes, including reactive dyes, using the ink-jet process or some other minimal add-on spraying technique producing brilliant and water-resistant prints.
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 December 17, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 17, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 17, 2015.
- 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.