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Expired European patentEurope

Closing device for a venting duct of a gas tank

EP 0283576 B1 · Applicant: Dr.Ing.h.c. F. Porsche Aktiengesellschaft

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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 December 14, 1987 and granted February 6, 1991. A European patent lasts at most 20 years from filing, so its term ended December 14, 2007.
  • 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, 2013.
  • 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, 1987
PublishedSeptember 28, 1988
GrantedFebruary 6, 1991
Term endedDecember 14, 2007
Application numberEP 87118475
Classification (CPC)F02M37/20 +1 more

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedDec 14, 1987PublishedSep 28, 1988Patent grantedFeb 6, 1991Term endedDec 14, 2007

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.