Security paper for bank notes and the like
CA 1316958 C · Owner: Portals Limited · Inventors: Knight, Malcolm Robert Murray; Melling, Raymond Joseph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Security papers according to the invention comprise opposed surfaces for the provision of printing to identify a document formed from the paper and, positioned at least partially between the two surfaces of the paper as a public security feature a security device of not more than 5mm width which, device comprises a flexible, water-impermeable substrate with a layer of metal on one or both sides of the substrate, there being present on one side of the device a continous metal path along its length wherein said device has metal-free portions of between 10% and 50% of the area of the device said, metal-free portions along the length of the device providing a repeating pattern, design, indicia …
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
- Granted April 27, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 27, 2010.
- 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.