Patent Yard Sign in
European application, no grantEurope

Composite particles and process for preparation thereof

EP 0306331 A2 · Applicant: SOKEN CHEMICAL & ENGINEERING CO. LTD.,

EPO PDF

Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

Read the whole patent

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.

Google PatentsEPO PDF

Why it's free to use

  • Filed September 2, 1988 and never granted as a European patent. Had it been granted, its 20-year term would have ended September 2, 2008.
  • 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 March 2, 2014.
  • 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.
FiledSeptember 2, 1988
PublishedMarch 8, 1989
GrantedNever granted
Term endedSeptember 2, 2008
Application numberEP 88308154
Classification (CPC)G03G9/0825

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedSep 2, 1988PublishedMarch 8, 1989Term endedSep 2, 2008

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.