Color changing device for time indicating label and methods of making and using the same
CA 2478308 A1 · Owner: Ercillo, Jesse C. · Inventors: Banks, Donald E.; Ercillo, Jesse C.; Hodson, Jerry G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a time indicating label (100) comprising (a) a label substrate (102) having a first and second surface (b) an acid-based , indicator composition (104) and (c) an activator composition (106) wherein , one of (b) or (c) are on the first surface of the substrate and wherein (b) and (c) when brought in contact remain adhered. The label (100) may have a pressure sensitive adhesive on the second surface of the label (100). The invention further relates to a method of using the time-temperature indicating label (100). The labels (100) provide an effective means for determine the safety of frozen foods. The labels also provide a means of providing security by …
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 March 7, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 7, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 7, 2025.
- 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.