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Expired European patentEurope

Oil level and flow sensing apparatus for vacuum pump service

EP 0034487 B1 · Applicant: GENERAL SIGNAL CORPORATION

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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 February 13, 1981 and granted June 12, 1985. A European patent lasts at most 20 years from filing, so its term ended February 13, 2001.
  • 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 August 13, 2006.
  • 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.
FiledFebruary 13, 1981
PublishedAugust 26, 1981
GrantedJune 12, 1985
Term endedFebruary 13, 2001
Application numberEP 81300611
Classification (CPC)G01F23/14 +1 more

Timeline

Timeline From EPO dates

1982198419861988199019921994199619982000Application filedFeb 13, 1981PublishedAug 26, 1981Patent grantedJune 12, 1985Term endedFeb 13, 2001

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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