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Expired European patentEurope

Air flow control valve and method of constructing it

EP 0007165 B1 · Applicant: SPIRO INVESTMENT S.A.

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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 May 29, 1979 and granted March 2, 1983. A European patent lasts at most 20 years from filing, so its term ended May 29, 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 November 29, 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.
FiledMay 29, 1979
PublishedJanuary 23, 1980
GrantedMarch 2, 1983
Term endedMay 29, 1999
Application numberEP 79300970
Classification (CPC)F16K1/126 +1 more

Timeline

Timeline From EPO dates

1980198219841986198819901992199419961998Application filedMay 29, 1979PublishedJan 23, 1980Patent grantedMarch 2, 1983Term endedMay 29, 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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