Patent Yard Sign in
Expired European patentEurope

Device for indicating the specific loading of metals of ion exchangers

EP 0022503 B1 · Applicant: DORNIER SYSTEM GmbH

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 June 28, 1980 and granted April 14, 1982. A European patent lasts at most 20 years from filing, so its term ended June 28, 2000.
  • 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 December 28, 2005.
  • 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.
FiledJune 28, 1980
PublishedJanuary 21, 1981
GrantedApril 14, 1982
Term endedJune 28, 2000
Application numberEP 80103678
Classification (CPC)B01J47/14 +1 more

Timeline

Timeline From EPO dates

1981198319851987198919911993199519971999Application filedJune 28, 1980PublishedJan 21, 1981Patent grantedApril 14, 1982Term endedJune 28, 2000

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.