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Expired European patentEurope

Treatment of porous structures

EP 0166751 B1 · Applicant: RUDD, Norman

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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 November 30, 1984 and granted August 16, 1989. A European patent lasts at most 20 years from filing, so its term ended November 30, 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 May 30, 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.
FiledNovember 30, 1984
PublishedJanuary 8, 1986
GrantedAugust 16, 1989
Term endedNovember 30, 2004
Application numberEP 85900144
Classification (CPC)E04B1/648

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedNov 30, 1984PublishedJan 8, 1986Patent grantedAug 16, 1989Term endedNov 30, 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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