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Expired European patentEurope

High voltage bridge interface for AC and brushless DC motor control

EP 0444404 B1 · Applicant: MOTOROLA INC.

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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 January 14, 1991 and granted October 8, 1997. A European patent lasts at most 20 years from filing, so its term ended January 14, 2011.
  • 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 July 14, 2016.
  • 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.
FiledJanuary 14, 1991
PublishedSeptember 4, 1991
GrantedOctober 8, 1997
Term endedJanuary 14, 2011
Application numberEP 91100366
Classification (CPC)H03K17/04123 +1 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedJan 14, 1991PublishedSep 4, 1991Patent grantedOct 8, 1997Term endedJan 14, 2011

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.