Finely particulate composite containing carbon compound encapsulated therein
CA 2542049 C · Owner: Kataoka, Kazunori · Inventors: Kataoka, Kazunori; Kodaka, Ryosuke; Nagasaki, Yukio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention provides a finely particulate composite wherein a fine particle of block copolymer having a poly(ethyleneglycol) chain segment and a poly(meth)acrylate ester chain segment containing on , its side chain, a tertiary amino group and/or a secondary amino group has, encapsulated therein, a carbon compound e.g. fullerene or, carbon nanotube which may contains encapsulated therein, a metal. , This composite is water-soluble and is usable as an active oxygen , scavenger. This composite when it has a metal encapsulated , therein is usable as a contrast medium.
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 September 6, 2004 and granted July 17, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 6, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 6, 2026.
- 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.