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Expired European patentEurope

A feedback loss protection in a power supply

EP 0668654 B1 · Applicant: THOMSON CONSUMER ELECTRONICS, INC.

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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 February 9, 1995 and granted April 28, 1999. A European patent lasts at most 20 years from filing, so its term ended February 9, 2015.
  • 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 August 9, 2020.
  • 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.
FiledFebruary 9, 1995
PublishedAugust 23, 1995
GrantedApril 28, 1999
Term endedFebruary 9, 2015
Application numberEP 95101721
Classification (CPC)H02M1/32 +1 more

Timeline

Timeline From EPO dates

1996199820002002200420062008201020122014Application filedFeb 9, 1995PublishedAug 23, 1995Patent grantedApril 28, 1999Term endedFeb 9, 2015

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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