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Expired European patentEurope

Spent caustic pretreatment and enhanced oxidation process

EP 1066100 B1 · Applicant: Stone & Webster Process Technology, 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 February 19, 1999 and granted December 28, 2005. A European patent lasts at most 20 years from filing, so its term ended February 19, 2019.
  • 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 August 19, 2024.
  • 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.
FiledFebruary 19, 1999
PublishedJanuary 10, 2001
GrantedDecember 28, 2005
Term endedFebruary 19, 2019
Application numberEP 99936038
Classification (CPC)B01D3/009 +2 more

Timeline

Timeline From EPO dates

2000200220042006200820102012201420162018Application filedFeb 19, 1999PublishedJan 10, 2001Patent grantedDec 28, 2005Term endedFeb 19, 2019

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

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