Security paper containing vesiculated beads
CA 1282913 C · Owner: Hamilton, Robert H. · Inventors: Hamilton, Robert H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Security paper contains polymeric vesiculated beads having a volume average particle size of at least about 10 microns up to about 35 microns, these beads containing dye or pigment which glows when irradiated with nonvisible radiation and, being hard to see when the paper is viewed with the naked eye under normal visible 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 April 16, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 16, 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.