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Expired European patentEurope

1-(2-Sulfamoylaminoethyl)-1,4-dihydro-5H-tetrazole-5-thione and its salts

EP 0018669 B1 · Applicant: SMITHKLINE BECKMAN CORPORATION

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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 June 9, 1978 and granted April 14, 1982. A European patent lasts at most 20 years from filing, so its term ended June 9, 1998.
  • 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 December 9, 2003.
  • 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.
FiledJune 9, 1978
PublishedNovember 12, 1980
GrantedApril 14, 1982
Term endedJune 9, 1998
Application numberEP 80200252
Classification (CPC)C07D257/04 +2 more

Timeline

Timeline From EPO dates

1979198119831985198719891991199319951997Application filedJune 9, 1978PublishedNov 12, 1980Patent grantedApril 14, 1982Term endedJune 9, 1998

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.