Patent Yard Sign in
Expired European patentEurope

Graphite trolley shoe and process for its manufacture

EP 0449909 B1 · Applicant: HOFFMANN & CO. ELEKTROKOHLE GESELLSCHAFT M.B.H.

EPO PDF

Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

Read the whole patent

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.

Google PatentsEPO PDF

Why it's free to use

  • Filed December 20, 1989 and granted April 7, 1993. A European patent lasts at most 20 years from filing, so its term ended December 20, 2009.
  • 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 June 20, 2015.
  • 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.
FiledDecember 20, 1989
PublishedOctober 9, 1991
GrantedApril 7, 1993
Term endedDecember 20, 2009
Application numberEP 90900814
Classification (CPC)H01R39/24

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedDec 20, 1989PublishedOct 9, 1991Patent grantedApril 7, 1993Term endedDec 20, 2009

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.