Imaging plastics materials
CA 2008253 C · Owner: Eldred, James Raymond · Inventors: Eldred, James Raymond; Ezra, David; Caudell, Martin John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of providing an image on an article including at least a first plastics layer. The method comprises transferring portions of at least one diffusible dye on to the first plastics layer the, portions being selected so as to generate a representation of the image on the layer. The or each dye is then caused to diffuse in to and partially remain in the first layer and at least to mark and preferably diffuse in to a second layer in contact with the first layer.
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 January 22, 1990 and granted July 25, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 22, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 22, 2012.
- 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.