Expired European patentEurope
Vitreous carbon-active carbon composite material, process for producing said composite material, and polarizable electrode using said composite material for use in electric double layer capacitor
EP 0626357 B1 · Applicant: NISSHINBO INDUSTRIES, INC.
Overview
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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed May 20, 1994 and granted November 12, 1997. A European patent lasts at most 20 years from filing, so its term ended May 20, 2014.
- A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by November 20, 2019.
- We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledMay 20, 1994
PublishedNovember 30, 1994
GrantedNovember 12, 1997
Term endedMay 20, 2014
Application numberEP 94107859
Classification (CPC)C04B35/524 +2 more
Timeline
Timeline From EPO dates
Sources & verification
Official EPO records
Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.