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Expired European patentEurope

New tungsten-hexa-(dialkyldithiocarbamates) and process for their preparation

EP 0534357 B1 · Applicant: Dr. Spiess Chemische Fabrik GmbH & Co.

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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 September 22, 1992 and granted December 18, 1996. A European patent lasts at most 20 years from filing, so its term ended September 22, 2012.
  • 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 March 22, 2018.
  • 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.
FiledSeptember 22, 1992
PublishedMarch 31, 1993
GrantedDecember 18, 1996
Term endedSeptember 22, 2012
Application numberEP 92116160
Classification (CPC)C07C333/16 +1 more

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedSep 22, 1992PublishedMarch 31, 1993Patent grantedDec 18, 1996Term endedSep 22, 2012

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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