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Expired European patentEurope

Method and composition for controlling color in a peroxide-Peroxidase disinfecting system

EP 0447582 B1 · Applicant: Symbollon Corporation

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Overview

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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 March 20, 1990 and granted June 12, 1996. A European patent lasts at most 20 years from filing, so its term ended March 20, 2010.
  • 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 September 20, 2015.
  • 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.
FiledMarch 20, 1990
PublishedSeptember 25, 1991
GrantedJune 12, 1996
Term endedMarch 20, 2010
Application numberEP 90105256
Classification (CPC)A61L2/186 +2 more

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedMarch 20, 1990PublishedSep 25, 1991Patent grantedJune 12, 1996Term endedMarch 20, 2010

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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