Method for preparing polychromatic printing plates
CA 2036751 C · Owner: Creo Il. Ltd. · Inventors: Yosefi, Hanan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of processing a file of recorded color separation values of color elements for use in preparing polychromatic printing plates in order to reduce or eliminate defects caused by misregistration by printing, includes the steps: (a) defining a plurality of predetermined color types; (b) identifying the color pairs where there is a change in color between adjacent color elements; and (c) for each color pair, determining whether or not to make a frame according to first predetermined criteria based on specific combination of color types in the pair and, then according to second predetermined criteria based on the difference in luminance between corresponding color separations in the …
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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 February 20, 1991 and granted April 27, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 20, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 20, 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.