Ink-jet recording method and apparatus
CA 2100978 C · Owner: Uetuki, Masaya · Inventors: Gotoh, Fumihiro; Koitabashi, Noribumi; Uetuki, Masaya
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-jet recording method which, comprises supplying an ink-jet recording head with a water-based ink containing a surfactant in a predetermined amount lower than the critical micelle concentration of the surfactant in the water-based ink (c.m.c in ink) but higher, than the critical micelle concentration of the surfactant in purified water (c.m.c. in purified water) thereby, conducting recording with the ink on a recording 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 July 21, 1993 and granted September 9, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 21, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 21, 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.