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Expired European patentEurope

Variable gas volume flow measuring and control methods and apparatus

EP 0335040 B1 · Applicant: Ginn, LeRoyce Sloe

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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 November 23, 1988 and granted October 26, 1994. A European patent lasts at most 20 years from filing, so its term ended November 23, 2008.
  • 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 May 23, 2014.
  • 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.
FiledNovember 23, 1988
PublishedOctober 4, 1989
GrantedOctober 26, 1994
Term endedNovember 23, 2008
Application numberEP 88311058
Classification (CPC)G01F1/22 +2 more

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedNov 23, 1988PublishedOct 4, 1989Patent grantedOct 26, 1994Term endedNov 23, 2008

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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