Ink, ink-jet recording process, and instrument using the same
CA 2037220 C · Owner: Fukushima, Kyoko · Inventors: Shirota, Koromo; Fukushima, Kyoko; Koike, Shoji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Provided is an ink comprising a recording agent and a liquid medium capable of dissolving or dispersing the recording agent, wherein said ink comprises from 0.1 % to 10 % by weight of a watersoluble dye, from 75 % to 95 % by weight of water and from 4 % to 20 % by weight of a mixture of 1,2,6hexanetriol and an addition polymer of ethylene oxide.
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 February 27, 1991 and granted June 3, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 27, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 27, 2013.
- 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.