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Expired European patentEurope

Preparation of fine particulate silica

EP 0706972 B1 · Applicant: Shin-Etsu Chemical Co., Ltd.

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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 10, 1995 and granted January 3, 2001. A European patent lasts at most 20 years from filing, so its term ended October 10, 2015.
  • 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 10, 2021.
  • 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 10, 1995
PublishedApril 17, 1996
GrantedJanuary 3, 2001
Term endedOctober 10, 2015
Application numberEP 95307145
Classification (CPC)C01B33/183

Timeline

Timeline From EPO dates

1996199820002002200420062008201020122014Application filedOct 10, 1995PublishedApril 17, 1996Patent grantedJan 3, 2001Term endedOct 10, 2015

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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