Temperature monitoring
CA 2090336 A1 · Owner: Marks And Spencer Plc · Inventors: Gregory, Noel; Stewart, Douglas; Hay, Frank S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rigid polymeric matt-finish box of rectangular shape, and size generally resembling a package of chilled foodstuff contains internally a block of iron (15) wrapped in elastomeric foam portions (16), as a heat-sink responsive to temperature of the surrounding air, and arising from incident radiation in, generally the same manner as a typically cook-chill foodstuff i.e. cooked chicken portions. Temperature sensor (17) is read at intervals controlled by time-interval sampling means (18) and these temperature data are stored electronically at (19). Computational unit (20) operates jointly on temperature sampled, and on a measured period of sampling to indicate alarm conditions, externally at …
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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 August 27, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 27, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 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.