Niobium powder, niobium sintered body and capacitor using the sintered body
CA 2419291 A1 · Owner: Showa Denko K.K. · Inventors: Wada, Kouichi; Naito, Kazumi; Kawasaki, Toshiya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A niobium powder for a capacitor having a tapping density of 0.5 to 2.5 g/ml and average particle size of 10 to 1000 ~mum angle of repose form 10~ to 60~, the BET specific surface area from 0.5 to 40 m2/g and a plurity of pore diameter peak tops in the pore distribution and a producing method therof; , (2) a niobium sintered body which is obtained by sintering the above niobium powder and, having a plurality of pore diameter peak tops in a range of 0.01~mum to 500~mum, preferably, the peak tops of two peaks among the plurality of pore diameter peak tops having a highest relative intensity are present in the range of 0.2 to 0.7 ~mum and in the range of 0.7 to 3 ~mum respectively, and a …
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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 May 14, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 14, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 14, 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.