Ink-jet recording medium, and ink-jet recording method employing the same
CA 2044129 C · Owner: Canon Kabushiki Kaisha · Inventors: Sakaki, Mamoru; Sato, Hiroshi; Nakatsugawa, Tomomi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A recording medium comprises basic magnesium carbonate and a magnesium salt of silicic acid or of phosphorus oxy-acid. Ink-jet recording is conducted using the recording medium to obtain high image density without any problem such as indoor discoloration, white haze, fattening of letters etc.
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 June 7, 1991 and granted August 20, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 7, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 7, 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.