Laminated printing sheet
CA 2178933 C · Owner: Johnston, Gordon Douglas Folster · Inventors: Johnston, Gordon Douglas Folster
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A laminated printing sheet (10) includes a sheet of synthetic paper (12) removably adhered by an adhesive (14) to one side of a polypropylene sheet (16). A paper backing sheet (18) is adhered to the opposite side of the polypropylene sheet (16) by an adhesive (20). The adhesive (14) is partially activated. The polypropylene sheet (16) is biaxially orientated. The surface of the polypropylene sheet (16) facing the paper is modified by corona discharge treatment. The laminated printing sheet is used to produce identity cards and documents.
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 14, 1994 and granted November 20, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 14, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 14, 2016.
- 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.