Embossed document protection methods and products
CA 2224758 A1 · Owner: Wicker, Kenneth M. · Inventors: Wicker, David M.; Wicker, Kenneth M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A security document has at least one set of printed lines of color having a pitch wherein a part of the printed lines are embossed. The embossed part of the lines from a latent image. The latent image is visible when viewed from non-perpendicular angles relative to the document and angle of embossment. The latent image is invisible when the document is viewed at the perpendicular angle to the document or when viewing a copy of the original document.
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 12, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 12, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 12, 2019.
- 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.