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Expired European patentEurope

Method of preparation of O,S-dialkylthiophosphoric acid chlorides

EP 0003553 B1 · Applicant: BASF Aktiengesellschaft

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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 January 31, 1979 and granted October 29, 1980. A European patent lasts at most 20 years from filing, so its term ended January 31, 1999.
  • 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 July 31, 2004.
  • 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.
FiledJanuary 31, 1979
PublishedAugust 22, 1979
GrantedOctober 29, 1980
Term endedJanuary 31, 1999
Application numberEP 79100279
Classification (CPC)C07F9/20

Timeline

Timeline From EPO dates

1980198219841986198819901992199419961998Application filedJan 31, 1979PublishedAug 22, 1979Patent grantedOct 29, 1980Term endedJan 31, 1999

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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