Security, information document
CA 2060716 C · Owner: Neitman, Robert L. · Inventors: Mowry, William Harvey, Jr.; Neitman, Robert L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A security, information document for providing information to a reader from an information source organization includes a document substrate having a first area in which a half-tone warning image is printed indicating that a copy of the document is an unauthorized document. A half-tone background image is printed in a second area on the substrate, with the second area surrounding the first area. A camouflage image extends over the document substrate for confusing the eye of an observer such that the warning image is not readily observed. One of the half-tone warning image and the half-tone background image is printed with a half-tone screen of such a line spacing that it is not readily …
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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 February 10, 1992 and granted June 23, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 10, 2014.
- 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.