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Expired European patentEurope

Process for preparation of composite materials comprising porous, hollow particles

EP 0154751 B1 · Applicant: UNITED KINGDOM ATOMIC ENERGY AUTHORITY

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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 December 18, 1984 and granted December 7, 1988. A European patent lasts at most 20 years from filing, so its term ended December 18, 2004.
  • 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 June 18, 2010.
  • 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.
FiledDecember 18, 1984
PublishedSeptember 18, 1985
GrantedDecember 7, 1988
Term endedDecember 18, 2004
Application numberEP 84308869
Classification (CPC)B01J20/28047 +2 more

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedDec 18, 1984PublishedSep 18, 1985Patent grantedDec 7, 1988Term endedDec 18, 2004

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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