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Expired European patentEurope

Apparatus for controlling the overflow and water level of hydraulic installations

EP 0509422 B1 · Applicant: APA ABWASSERTECHNIK GmbH

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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 April 12, 1992 and granted November 29, 1995. A European patent lasts at most 20 years from filing, so its term ended April 12, 2012.
  • 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 October 12, 2017.
  • 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.
FiledApril 12, 1992
PublishedOctober 21, 1992
GrantedNovember 29, 1995
Term endedApril 12, 2012
Application numberEP 92106323
Classification (CPC)E03F5/12 +2 more

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedApril 12, 1992PublishedOct 21, 1992Patent grantedNov 29, 1995Term endedApril 12, 2012

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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