Color reproduction process
CA 2415009 C · Owner: Weyerhaeuser Company · Inventors: Lee, David L.; West, Hugh
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of color printing is described in which only two transparent inks are used to reproduce a source image. The original digitally encoded image in red, green , and blue colors may be initially adjusted for contrast brightness, color , balance, and tonal value. This is then converted to cyan, magenta and yellow encoding. The two of these , channels which best represent the dominant colors of original image are then selected. , The critical colors of the original image to be reproduced with reasonable accuracy are , determined and spot colors that best represent these are selected from an ink palette. The , spot colors are assigned to the selected channels to which they have the …
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 December 23, 2002 and granted April 12, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 23, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 23, 2024.
- 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.