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Expired European patentEurope

Synthesis of aluminosilicate zeolites with faujasite structure

EP 0443004 B1 · Applicant: SOCIETE NATIONALE ELF AQUITAINE

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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 September 11, 1990 and granted February 16, 1994. A European patent lasts at most 20 years from filing, so its term ended September 11, 2010.
  • 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 11, 2016.
  • 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 11, 1990
PublishedAugust 28, 1991
GrantedFebruary 16, 1994
Term endedSeptember 11, 2010
Application numberEP 90913489
Classification (CPC)C01B39/205 +1 more

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedSep 11, 1990PublishedAug 28, 1991Patent grantedFeb 16, 1994Term endedSep 11, 2010

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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