Patent Yard Sign in
Expired European patentEurope

Method for separating ionic species using capillary electrophoresis

EP 0442315 B1 · Applicant: WATERS INVESTMENTS LIMITED

EPO PDF

Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

Read the whole patent

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.

Google PatentsEPO PDF

Why it's free to use

  • Filed January 28, 1991 and granted June 10, 1998. A European patent lasts at most 20 years from filing, so its term ended January 28, 2011.
  • 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 28, 2016.
  • 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 28, 1991
PublishedAugust 21, 1991
GrantedJune 10, 1998
Term endedJanuary 28, 2011
Application numberEP 91101064
Classification (CPC)G01N27/44721

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedJan 28, 1991PublishedAug 21, 1991Patent grantedJune 10, 1998Term endedJan 28, 2011

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.