Use indicating soap
CA 2479209 C · Owner: Kim, Jaeho · Inventors: Agarwal, Naveen; Huang, Yanbin; Kim, Jaeho
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is provided a soap that contains an indicator that produces an observable change after a period of time to show that sufficient cleaning has been done or to indicate the thoroughness of the cleaning. The soap is preferably made from two components that produce a color and/or viscosity changes after about 30 seconds of use. This use indicating change is useful for, for example, teaching children to wash their hands for a sufficient period of time.
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 5, 2003 and granted January 31, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 5, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 5, 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.