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Expired European patentEurope

Lipid-soluble redox system and its use in polymerisation reactions in the inverted emulsion of water-soluble reactive vinyl monomers

EP 0100693 B1 · Applicant: SOCIETE FRANCAISE HOECHST Société anonyme dite:

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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 June 17, 1983 and granted April 1, 1987. A European patent lasts at most 20 years from filing, so its term ended June 17, 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 December 17, 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.
FiledJune 17, 1983
PublishedFebruary 15, 1984
GrantedApril 1, 1987
Term endedJune 17, 2003
Application numberEP 83401256
Classification (CPC)C08F2/32 +1 more

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedJune 17, 1983PublishedFeb 15, 1984Patent grantedApril 1, 1987Term endedJune 17, 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

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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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