Methods and apparatuses for purifying carbon filamentary structures
CA 2575479 C · Owner: Institut National De La Recherche Scientifique · Inventors: Stansfield, Barry L.; Larouche, Frederic; Smiljanic, Olivier
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is provided a method of purifying carbon filamentary structures contaminated with magnetic metal particles. The method comprises submitting a gaseous phase comprising said carbon filamentary structures contaminated , with magnetic metal particles to an inhomogeneous magnetic field , for at least partially trapping said magnetic metal particles thereby , reducing , the proportion of said magnetic metal particles present in said gaseous phase. The method is particularly useful for purifying carbon filamentary structures such as multi-wall carbon nanotubes, single-wall carbon nanotubes or carbon fibers. An apparatus for purifying such carbon filamentary structures contaminated , …
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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 March 23, 2006 and granted May 22, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 23, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.