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Expired European patentEurope

Magnetic brush development device for an electrostatic copying apparatus

EP 0158772 B1 · Applicant: MITA INDUSTRIAL CO. LTD.

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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 March 30, 1983 and granted September 7, 1988. A European patent lasts at most 20 years from filing, so its term ended March 30, 2003.
  • 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 September 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.
FiledMarch 30, 1983
PublishedOctober 23, 1985
GrantedSeptember 7, 1988
Term endedMarch 30, 2003
Application numberEP 85100713
Classification (CPC)G03G15/00 +2 more

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedMarch 30, 1983PublishedOct 23, 1985Patent grantedSep 7, 1988Term endedMarch 30, 2003

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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