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Expired European patentEurope

Regeneration of sulfuric acid from sulfate by-products of 2-hydroxy-4-(methylthio)butyric acid manufacture

EP 0705060 B1 · Applicant: Novus International, 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 October 21, 1993 and granted January 15, 2003. A European patent lasts at most 20 years from filing, so its term ended October 21, 2013.
  • 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 21, 2019.
  • 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 21, 1993
PublishedApril 10, 1996
GrantedJanuary 15, 2003
Term endedOctober 21, 2013
Application numberEP 93924374
Classification (CPC)C01B17/745 +2 more

Timeline

Timeline From EPO dates

1994199619982000200220042006200820102012Application filedOct 21, 1993PublishedApril 10, 1996Patent grantedJan 15, 2003Term endedOct 21, 2013

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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