Patent Yard Sign in
Expired European patentEurope

Process for the treatment of gases containing sulphur dioxide

EP 0484222 B1 · Applicant: Dyens, Pierre

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 October 29, 1991 and granted April 5, 1995. A European patent lasts at most 20 years from filing, so its term ended October 29, 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 April 29, 2017.
  • 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.
FiledOctober 29, 1991
PublishedMay 6, 1992
GrantedApril 5, 1995
Term endedOctober 29, 2011
Application numberEP 91402889
Classification (CPC)C25B1/22 +2 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedOct 29, 1991PublishedMay 6, 1992Patent grantedApril 5, 1995Term endedOct 29, 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.