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Expired European patentEurope

Method for producing polysulfide by electrolytic oxidation

EP 1018486 B1 · Applicant: ASAHI GLASS COMPANY LTD.

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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 May 27, 1999 and granted September 8, 2010. A European patent lasts at most 20 years from filing, so its term ended May 27, 2019.
  • 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 November 27, 2024.
  • 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.
FiledMay 27, 1999
PublishedJuly 12, 2000
GrantedSeptember 8, 2010
Term endedMay 27, 2019
Application numberEP 99922510
Classification (CPC)D21C11/0057 +2 more

Timeline

Timeline From EPO dates

2000200220042006200820102012201420162018Application filedMay 27, 1999PublishedJuly 12, 2000Patent grantedSep 8, 2010Term endedMay 27, 2019

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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