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Expired European patentEurope

Linear perturbation method for kalman filter tracking of magnetic field sources

EP 1040370 B1 · Applicant: Raytheon Company

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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 October 14, 1999 and granted November 19, 2003. A European patent lasts at most 20 years from filing, so its term ended October 14, 2019.
  • 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 April 14, 2025.
  • 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.
FiledOctober 14, 1999
PublishedOctober 4, 2000
GrantedNovember 19, 2003
Term endedOctober 14, 2019
Application numberEP 99953204
Classification (CPC)G01V3/081

Timeline

Timeline From EPO dates

2000200220042006200820102012201420162018Application filedOct 14, 1999PublishedOct 4, 2000Patent grantedNov 19, 2003Term endedOct 14, 2019

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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