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Expired European patentEurope

Process for producing high purity metallic compound

EP 0116319 B1 · Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED

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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 January 19, 1984 and granted April 12, 1989. A European patent lasts at most 20 years from filing, so its term ended January 19, 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 July 19, 2009.
  • 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.
FiledJanuary 19, 1984
PublishedAugust 22, 1984
GrantedApril 12, 1989
Term endedJanuary 19, 2004
Application numberEP 84100564
Classification (CPC)C07F7/003 +2 more

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedJan 19, 1984PublishedAug 22, 1984Patent grantedApril 12, 1989Term endedJan 19, 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.