Fluorescent polymeric pigments
CA 2318972 A1 · Owner: Dipietro, Thomas C. · Inventors: Dipietro, Thomas C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Thermoplastic, non-water soluble, fluorescent pigments having improved lightfastness are provided which are suitable for coloring a variety of materials including plastics, particularly polyolefins as well as paints, inks and textiles. The lightfast pigments of the present invention have several embodiments, the polyamide, polyamide ester and the polyester embodiments. They comprise copolymerized units of fluorescent dye and monomers such as dicarboxylic acids, polycarboxylic acids diamines, polyamines, alkanolamines, carboxyalcohols carboxyamines and difunctional and/or polyhydric alcohols. The fluorescent dye is reacted into and covalently bound , to the polymer backbone. The …
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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 January 27, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 27, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 27, 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.