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Expired European patentEurope

Method for making hydrophobic organosilicate-modified silica gels under neutral conditions

EP 1017624 B1 · Applicant: DOW CORNING 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 February 18, 1998 and granted November 3, 2004. A European patent lasts at most 20 years from filing, so its term ended February 18, 2018.
  • 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 18, 2023.
  • 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 18, 1998
PublishedJuly 12, 2000
GrantedNovember 3, 2004
Term endedFebruary 18, 2018
Application numberEP 98908621
Classification (CPC)C01B33/16

Timeline

Timeline From EPO dates

1999200120032005200720092011201320152017Application filedFeb 18, 1998PublishedJuly 12, 2000Patent grantedNov 3, 2004Term endedFeb 18, 2018

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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