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Expired European patentEurope

A method of space charge control in an ion trap mass spectrometer

EP 0701471 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 10, 1995 and granted April 7, 1999. A European patent lasts at most 20 years from filing, so its term ended January 10, 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 10, 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 10, 1995
PublishedMarch 20, 1996
GrantedApril 7, 1999
Term endedJanuary 10, 2015
Application numberEP 95908022
Classification (CPC)H01J49/0031 +1 more

Timeline

Timeline From EPO dates

1996199820002002200420062008201020122014Application filedJan 10, 1995PublishedMarch 20, 1996Patent grantedApril 7, 1999Term endedJan 10, 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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