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Expired European patentEurope

Device for the surface treatment of strips of foil by electrical corona discharge

EP 0002453 B1 · Applicant: HOECHST AKTIENGESELLSCHAFT

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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.

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Why it's free to use

  • Filed November 22, 1978 and granted May 13, 1981. A European patent lasts at most 20 years from filing, so its term ended November 22, 1998.
  • 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 May 22, 2004.
  • 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.
FiledNovember 22, 1978
PublishedJune 27, 1979
GrantedMay 13, 1981
Term endedNovember 22, 1998
Application numberEP 78101428
Classification (CPC)H01T19/00

Timeline

Timeline From EPO dates

1979198119831985198719891991199319951997Application filedNov 22, 1978PublishedJune 27, 1979Patent grantedMay 13, 1981Term endedNov 22, 1998

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

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