Process and apparatus for the production of nanofibers
CA 2457136 C · Owner: Reneker, Darrell · Inventors: Reneker, Darrell
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A nozzle (60) for forming nanofibers by using a pressurized gas stream comprises a center tube (11), a first supply tube (61) that is positioned concentrically around and apart from the center tube (11) a middle gas tube , (73) positioned concentrically around and apart from the first supply tube (61), and a second supply tube (77) positioned concentrically around and apart from the middle gas tube (73). The center tube (11) and first supply tube (61) form a first annular column (69). The middle gas tube (73) and the first supply tube (61) form a second annular column (75). The middle gas tube (73) and second supply tube (77) form a third annular column (79). The tubes are positioned …
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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 August 20, 2002 and granted November 20, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 20, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 20, 2024.
- 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.