Method and instrument for selecting personal compatible colors
CA 2188656 C · Owner: Chromatics Color Sciences International, Inc. · Inventors: Billmeyer, Fred W. Jr.; Macfarlane, David K.; Macfarlane, Darby S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Skin coloration categories are identified based upon opponent color undertones of the skin. For example using a color measuring, device (10), Hunter b value is developed from measures of blue yellow and lightness. That value alone then determines which of several categories of skin coloration a subject's skin exhibits. Category selection is made by comparison of measured Hunter b with ranges of Hunter b values of skin color categories. Instrumentation includes the color measuring device (10) a central processing unit (15), memory (17), and an output device. The skin color Hunter b is calculated and compared to stored ranges to assign a category which is then displayed on the output device. …
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 May 9, 1994 and granted October 30, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 9, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 9, 2016.
- 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.