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Expired European patentEurope

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EP 0229220 B1 · Applicant: Sprecher Energie AG

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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 August 16, 1986 and granted September 27, 1989. A European patent lasts at most 20 years from filing, so its term ended August 16, 2006.
  • 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 16, 2012.
  • 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 16, 1986
PublishedJuly 22, 1987
GrantedSeptember 27, 1989
Term endedAugust 16, 2006
Application numberEP 86111351
Classification (CPC)H01F38/38

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedAug 16, 1986PublishedJuly 22, 1987Patent grantedSep 27, 1989Term endedAug 16, 2006

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.