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Expired European patentEurope

A method of selective ion trapping for quadrupole ion trap mass spectrometers

EP 0715538 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 January 11, 1995 and granted March 24, 1999. A European patent lasts at most 20 years from filing, so its term ended January 11, 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 July 11, 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.
FiledJanuary 11, 1995
PublishedJune 12, 1996
GrantedMarch 24, 1999
Term endedJanuary 11, 2015
Application numberEP 95908467
Classification (CPC)H01J49/424 +1 more

Timeline

Timeline From EPO dates

1996199820002002200420062008201020122014Application filedJan 11, 1995PublishedJune 12, 1996Patent grantedMarch 24, 1999Term endedJan 11, 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

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