Patterned indicators
CA 2094279 C · Owner: Temtec, Inc. · Inventors: Haas, Sandra F.; Haas, David J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A patterned indicator (100) is provided which contains latent information. The patterned indicator (100) includes a first substrate (114) having first and second surfaces (116 118), the first surface (116) having a uniform pattern printed on an ink (128) thereon. A second transparent substrate (122) having first and second surfaces (124 126) is also provided. An adhesive activator (130) is provided on the first surface (124) of the second substrate (122). The indicator (100) is activated by placement of the first surfaces (116, 124) of the first and second substrates (114 122) into adhesive contact such that the ink (128) and adhesive activator (130) coact to cause the ink pattern to …
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 June 27, 1991 and granted April 13, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 27, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 27, 2013.
- 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.