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Expired European patentEurope

Method of dynamically balancing cylindrical rotors, and device for carrying out the method

EP 0281286 B1 · Applicant: NGK INSULATORS, LTD.

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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 19, 1988 and granted February 6, 1991. A European patent lasts at most 20 years from filing, so its term ended February 19, 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 August 19, 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.
FiledFebruary 19, 1988
PublishedSeptember 7, 1988
GrantedFebruary 6, 1991
Term endedFebruary 19, 2008
Application numberEP 88301422
Classification (CPC)G01M1/02

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedFeb 19, 1988PublishedSep 7, 1988Patent grantedFeb 6, 1991Term endedFeb 19, 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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