Method and apparatus for producing ink intensity modulated ink jet printing
CA 2245374 C · Owner: Jaeger, C. Wayne · Inventors: Jaeger, C. Wayne; Kroon, Stephen M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A gray scale ink jet printing method and apparatus which produce a high quality images having varying color intensities are disclosed. This is achieved by using a clear phase change ink base and a plurality of colored phase change inks with varying amounts of black dye, thereby producing multiple gray scale levels of black in images with substantial contrast between the imaged and non-imaged areas that are used in medical diagnostic imaging applications.
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 August 18, 1998 and granted January 14, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 18, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 18, 2020.
- 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.