Expired European patentEurope
Method of preparing a composite material comprising an inorganic matrix in which vitreous carbon inclusions are dispersed, material obtained by this process and its utilisation as an electric contact
EP 0072306 B1 · Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE Etablissement de Caractère Scientifique Technique et Industriel
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 July 30, 1982 and granted April 24, 1985. A European patent lasts at most 20 years from filing, so its term ended July 30, 2002.
- 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 January 30, 2008.
- 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.
FiledJuly 30, 1982
PublishedFebruary 16, 1983
GrantedApril 24, 1985
Term endedJuly 30, 2002
Application numberEP 82401443
Classification (CPC)H01H1/025 +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.