Tamper evident radio frequency identification system and package
CA 2402674 A1 · Owner: International Paper · Inventors: Soehnlen, John P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tamper evident package and system where the package has a radio frequency identification tag (14) affixed to or imprinted onto the covering. An interrogator (16) emits an electromagnetic signal to the identification tag which responds with a predetermined signal if the covering of the package (26) is intact and has not been breached or the identification tag (14) may be powered and emit the predetermined signal intermittently or continuously by itself. An attempt to enter the package (26) disables the identification tag (14) and will cause the identification tag thereafter interrogated, to fail , to send a signal or will send a signal that is different from the predetermined …
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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 March 15, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 15, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 15, 2023.
- 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.