Color-changing beverage compositions
CA 2494159 A1 · Owner: Olds, Dale Frederick · Inventors: Thurman, Tracy; Lohmeyer, Debbie Linnea; Olds, Dale Frederick
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Beverage preparation kits are disclosed where the kits include beverage , compositions having a first component mixture and a second component mixture and a colorimetric pH indicator. The two component mixtures are formulated such that combination of the two mixtures during preparation of the beverage results in a detectable color change.
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 August 28, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 28, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 28, 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.