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Expired European patentEurope

Improved hydraulic system for aircraft

EP 0168844 B1 · Applicant: The Boeing Company

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Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

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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 20, 1985 and granted July 12, 1989. A European patent lasts at most 20 years from filing, so its term ended February 20, 2005.
  • 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 20, 2010.
  • 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 20, 1985
PublishedJanuary 22, 1986
GrantedJuly 12, 1989
Term endedFebruary 20, 2005
Application numberEP 85200225
Classification (CPC)B64C13/42

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedFeb 20, 1985PublishedJan 22, 1986Patent grantedJuly 12, 1989Term endedFeb 20, 2005

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.