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Expired European patentEurope

Process for the preparation of aromatic or heteroaromatic sulfonyl halides

EP 0770599 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 December 25, 1995 and granted August 7, 2002. A European patent lasts at most 20 years from filing, so its term ended December 25, 2015.
  • 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 June 25, 2021.
  • 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.
FiledDecember 25, 1995
PublishedMay 2, 1997
GrantedAugust 7, 2002
Term endedDecember 25, 2015
Application numberEP 95941882
Classification (CPC)C07D275/03 +2 more

Timeline

Timeline From EPO dates

1996199820002002200420062008201020122014Application filedDec 25, 1995PublishedMay 2, 1997Patent grantedAug 7, 2002Term endedDec 25, 2015

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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