Patent Yard Sign in
European application, no grantEurope

Method of preparing 1,2,4-triazolo [1,5-a] - pyrimidine-2-sulfonyl chlorides

EP 0142811 A2 · Applicant: THE DOW CHEMICAL COMPANY

EPO PDF

Overview

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

Read the whole patent

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.

Google PatentsEPO PDF

Why it's free to use

  • Filed November 12, 1984 and never granted as a European patent. Had it been granted, its 20-year term would have ended November 12, 2004.
  • 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 May 12, 2010.
  • 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.
FiledNovember 12, 1984
PublishedMay 29, 1985
GrantedNever granted
Term endedNovember 12, 2004
Application numberEP 84113655
Classification (CPC)C07D487/04

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedNov 12, 1984PublishedMay 29, 1985Term endedNov 12, 2004

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.