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Expired European patentEurope

Method for the continuous preparation of master batches for heat-vulcanizable silicone elastomer

EP 0258159 B1 · Applicant: RHONE-POULENC CHIMIE

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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 August 10, 1987 and granted March 28, 1990. A European patent lasts at most 20 years from filing, so its term ended August 10, 2007.
  • 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 February 10, 2013.
  • 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.
FiledAugust 10, 1987
PublishedMarch 2, 1988
GrantedMarch 28, 1990
Term endedAugust 10, 2007
Application numberEP 87420215
Classification (CPC)B29C48/022 +2 more

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedAug 10, 1987PublishedMarch 2, 1988Patent grantedMarch 28, 1990Term endedAug 10, 2007

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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