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Expired European patentEurope

Air ventilating device for a combination of a service brake cylinder and a spring brake cylinder

EP 0020862 B1 · Applicant: KNORR-BREMSE AG

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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 March 17, 1980 and granted May 26, 1982. A European patent lasts at most 20 years from filing, so its term ended March 17, 2000.
  • 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 September 17, 2005.
  • 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.
FiledMarch 17, 1980
PublishedJanuary 7, 1981
GrantedMay 26, 1982
Term endedMarch 17, 2000
Application numberEP 80101381
Classification (CPC)B60T17/083

Timeline

Timeline From EPO dates

1981198319851987198919911993199519971999Application filedMarch 17, 1980PublishedJan 7, 1981Patent grantedMay 26, 1982Term endedMarch 17, 2000

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.