Patent Yard Sign in
Expired European patentEurope

Process of preparing ferrite with a predetermined ferrous content

EP 0149758 B1 · Applicant: International Business Machines Corporation

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 November 27, 1984 and granted June 1, 1988. A European patent lasts at most 20 years from filing, so its term ended November 27, 2004.
  • 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 27, 2010.
  • 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 27, 1984
PublishedJuly 31, 1985
GrantedJune 1, 1988
Term endedNovember 27, 2004
Application numberEP 84114283
Classification (CPC)C01G49/009 +1 more

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedNov 27, 1984PublishedJuly 31, 1985Patent grantedJune 1, 1988Term endedNov 27, 2004

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.