Security identification badge
CA 2104480 C · Owner: Temtec, Inc. · Inventors: Haas, David J.; Haas, Sandra F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A self-expiring Security Identification Badge is provided. The badge includes a base substrate (11) having a void indicia area (14). Also included is an ink substrate (30) having an expired indicia area (34) of a soluble ink and an adhesive surface (32). Also included is an overlay substrate (40) having an ink dissolver (42) and a display surface (44). When the I.D. Badge is issued the inked substrate (30) is attached to the base substrate (11) with the inked substrate (30) covering the void indicia area (14). The overlay substrate (40) is then placed over and attached to the inked substrate (30) with the ink dissolver (42) in contact with the soluble ink (34) of the inked substrate (30). …
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 February 4, 1992 and granted January 26, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 4, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 4, 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.