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Expired European patentEurope

Twin cylinder slurry pump with a pipe switch

EP 0175929 B1 · Applicant: Friedrich Wilh. Schwing GmbH

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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 August 22, 1985 and granted January 16, 1991. A European patent lasts at most 20 years from filing, so its term ended August 22, 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 February 22, 2011.
  • 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.
FiledAugust 22, 1985
PublishedApril 2, 1986
GrantedJanuary 16, 1991
Term endedAugust 22, 2005
Application numberEP 85110538
Classification (CPC)F04B7/0258

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedAug 22, 1985PublishedApril 2, 1986Patent grantedJan 16, 1991Term endedAug 22, 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.