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Expired European patentEurope

Hydrophobic silica and its use in silicone rubber

EP 1841825 B1 · Applicant: Evonik Degussa GmbH

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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 29, 2005 and granted March 23, 2011. A European patent lasts at most 20 years from filing, so its term ended October 29, 2025.
  • Supplementary protection certificates extend only medicine and crop-protection patents, and it isn't classified as either.
  • 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, 2005
PublishedOctober 10, 2007
GrantedMarch 23, 2011
Term endedOctober 29, 2025
Application numberEP 05799459
Classification (CPC)C09C1/3045 +2 more

Timeline

Timeline From EPO dates

2006200820102012201420162018202020222024Application filedOct 29, 2005PublishedOct 10, 2007Patent grantedMarch 23, 2011Term endedOct 29, 2025

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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