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European application, no grantEurope

N-substituted sulfamoyl chlorides and preparation thereof

EP 0141199 A2 · Applicant: E.I. DU PONT DE NEMOURS AND COMPANY

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Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

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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 April 28, 1981 and never granted as a European patent. Had it been granted, its 20-year term would have ended April 28, 2001.
  • 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 October 28, 2006.
  • 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.
FiledApril 28, 1981
PublishedMay 15, 1985
GrantedNever granted
Term endedApril 28, 2001
Application numberEP 84110983
Classification (CPC)C07D521/00 +1 more

Timeline

Timeline From EPO dates

1982198419861988199019921994199619982000Application filedApril 28, 1981PublishedMay 15, 1985Term endedApril 28, 2001

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.