Fluorescent agents
CA 2395767 A1 · Owner: Minerals Technologies Inc. · Inventors: Slozer, Matthew Frederick; Saulsbery, Robin L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Composition comprising a fluorescent pigment comprising the reaction product of one or more metal salts selected from the group consisting of metal oxides and metal hydroxides; one or more carbohydrate(s) selected from the group consisting of sugar and starch; and one or more organic acid(s) method of , preparation comprising reacting the components in the presence of water and then drying, and use of the pigment in paper plastic, polymer, resin, and , paint. The resultant papers plastics, polymers, resins, and paint have whiteness and brightness due to the fluorescence.
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 December 29, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 29, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 29, 2021.
- 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.