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Expired European patentEurope

Suppression of radiation damping in NMR

EP 0823640 B1 · Applicant: VARIAN ASSOCIATES, 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 August 1, 1997 and granted June 8, 2005. A European patent lasts at most 20 years from filing, so its term ended August 1, 2017.
  • 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 1, 2023.
  • 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 1, 1997
PublishedFebruary 11, 1998
GrantedJune 8, 2005
Term endedAugust 1, 2017
Application numberEP 97305819
Classification (CPC)G01R33/3628

Timeline

Timeline From EPO dates

1998200020022004200620082010201220142016Application filedAug 1, 1997PublishedFeb 11, 1998Patent grantedJune 8, 2005Term endedAug 1, 2017

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

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