Color ink jet recording method and apparatus using black ink and color-mixed black ink
CA 2102005 C · Owner: Kanematsu, Daigoro · Inventors: Yano, Kentaro; Takahashi, Kiichiro; Otsuka, Naoji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Whether or not a color image is present adjacent to a black image is discriminated. Whether the black image is formed using a black ink or a plurality of color inks C M, and Y is determined in accordance with the discrimination result. When the black image is formed using the plurality of color inks it is recorded using a repetitive pattern of two of C M, and Y so as to prevent blurring with the color image and to improve fixing characteristics by decreasing the total ejection amount.
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 October 29, 1993 and granted October 12, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 29, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 29, 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.