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Expired European patentEurope

Non-return valve

EP 0673483 B1 · Applicant: TRANSCOM GAS TECHNOLOGIES PTY. LTD.

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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 December 14, 1993 and granted March 25, 1998. A European patent lasts at most 20 years from filing, so its term ended December 14, 2013.
  • 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 June 14, 2019.
  • 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.
FiledDecember 14, 1993
PublishedSeptember 27, 1995
GrantedMarch 25, 1998
Term endedDecember 14, 2013
Application numberEP 94902543
Classification (CPC)F02B19/1004

Timeline

Timeline From EPO dates

1994199619982000200220042006200820102012Application filedDec 14, 1993PublishedSep 27, 1995Patent grantedMarch 25, 1998Term endedDec 14, 2013

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.