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European application, no grantEurope

Long-life multi-stage ferrofluid seals incorporating a ferrofluid reservoir

EP 0367375 A1 · Applicant: Ferrofluidics 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 July 17, 1989 and never granted as a European patent. Had it been granted, its 20-year term would have ended July 17, 2009.
  • 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 January 17, 2015.
  • 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.
FiledJuly 17, 1989
PublishedMay 9, 1990
GrantedNever granted
Term endedJuly 17, 2009
Application numberEP 89307235
Classification (CPC)F16J15/43

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedJuly 17, 1989PublishedMay 9, 1990Term endedJuly 17, 2009

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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