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Expired European patentEurope

Process for preparing wide pore alumina supports

EP 0199396 B1 · Applicant: SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.

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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 March 26, 1986 and granted January 16, 1991. A European patent lasts at most 20 years from filing, so its term ended March 26, 2006.
  • 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 September 26, 2011.
  • 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.
FiledMarch 26, 1986
PublishedOctober 29, 1986
GrantedJanuary 16, 1991
Term endedMarch 26, 2006
Application numberEP 86200516
Classification (CPC)C01F7/02 +2 more

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedMarch 26, 1986PublishedOct 29, 1986Patent grantedJan 16, 1991Term endedMarch 26, 2006

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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