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Expired European patentEurope

Track and hold amplifier with controllable feedback between hold capacitor and input buffer

EP 1198798 B1 · Applicant: Koninklijke Philips Electronics N.V.

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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 14, 2001 and granted November 25, 2009. A European patent lasts at most 20 years from filing, so its term ended March 14, 2021.
  • 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 14, 2026.
  • 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 14, 2001
PublishedApril 24, 2002
GrantedNovember 25, 2009
Term endedMarch 14, 2021
Application numberEP 01913883
Classification (CPC)G11C27/026

Timeline

Timeline From EPO dates

2002200420062008201020122014201620182020Application filedMarch 14, 2001PublishedApril 24, 2002Patent grantedNov 25, 2009Term endedMarch 14, 2021

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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