Security paper for currency and banknotes
CA 1279880 C · Owner: Crane & Company Inc. · Inventors: Crane, Timothy T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Security devices in the form of metallized plastic films are incorporated within a security paper such a banknotes and other valuable documents during the papermaking process for viewing solely by means of transmitted light. The devices comprise printing of extreme fine line clarity and high opacity such that legibility is possible by means of transmitted light while remaining completely indiscernible under reflected light.
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 February 5, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 5, 2008.
- 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.