Ink for ink-jet recording
CA 2263829 C · Owner: Kurabayashi, Yutaka · Inventors: Koike, Shoji; Hakamada, Shinichi; Ogasawara, Masahi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An ink for ink-jet recording is provided that reduces long-term performance deterioration when used with an exothermic heater. The ink contains at least one substance selected from dicarboxylic acids dicarboxylates, tricarboxylic acids and tricarboxylates bis-hydroxyethyl sulfone, and a water-soluble coloring material in an aqueous medium.
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 2, 1999 and granted December 10, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 2, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 2, 2021.
- 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.