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Expired European patentEurope

Method for treating glycoside

EP 0255331 B1 · Applicant: SUMITOMO SEIKA CHEMICALS CO., 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 July 28, 1987 and granted September 29, 1993. A European patent lasts at most 20 years from filing, so its term ended July 28, 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 January 28, 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.
FiledJuly 28, 1987
PublishedFebruary 3, 1988
GrantedSeptember 29, 1993
Term endedJuly 28, 2007
Application numberEP 87306642
Classification (CPC)C07C51/48 +1 more

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedJuly 28, 1987PublishedFeb 3, 1988Patent grantedSep 29, 1993Term endedJuly 28, 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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