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Expired European patentEurope

Use of a graft-modified copolymer as a compounding agent for styrene-type polymers

EP 0090418 B1 · Applicant: MITSUI PETROCHEMICAL INDUSTRIES, 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 29, 1983 and granted October 18, 1989. A European patent lasts at most 20 years from filing, so its term ended March 29, 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 29, 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 29, 1983
PublishedOctober 5, 1983
GrantedOctober 18, 1989
Term endedMarch 29, 2003
Application numberEP 83103130
Classification (CPC)C08F255/02

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedMarch 29, 1983PublishedOct 5, 1983Patent grantedOct 18, 1989Term endedMarch 29, 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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