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Expired European patentEurope

METHOD FOR PURIFYING SiO2-PARTICLES AND DEVICE FOR CARRYING OUT SAID METHOD

EP 1098846 B1 · Applicant: Heraeus Quarzglas GmbH & Co. KG

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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 May 5, 2000 and granted December 29, 2004. A European patent lasts at most 20 years from filing, so its term ended May 5, 2020.
  • 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 November 5, 2025.
  • 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.
FiledMay 5, 2000
PublishedMay 16, 2001
GrantedDecember 29, 2004
Term endedMay 5, 2020
Application numberEP 00934984
Classification (CPC)C03C1/022 +1 more

Timeline

Timeline From EPO dates

2001200320052007200920112013201520172019Application filedMay 5, 2000PublishedMay 16, 2001Patent grantedDec 29, 2004Term endedMay 5, 2020

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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