Ink, and ink-jet recording method and instrument using the same
CA 2100523 C · Owner: Canon Kabushiki Kaisha · Inventors: Aoki, Makoto; Takizawa, Yoshihisa; Kurabayashi, Yutaka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed herein is an ink comprising at least a recording agent, a liquid medium dissolving the recording agent therein and a compound having thermo-reversible gelation property, wherein the ink is in a homogeneous solution system at 25C, and the compound having thermoreversible gelation property separates out in the ink solution in a temperature range of from 30C to 65C so, that the ink becomes a dispersion state. An ink-jet recording method and instruments making use of such an ink are also disclosed.
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 July 14, 1993 and granted June 3, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 14, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 14, 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.