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Expired European patentEurope

Crystalline silicates and process for the production thereof

EP 0102497 B1 · Applicant: RESEARCH ASSOCIATION FOR PETROLEUM ALTERNATIVES DEVELOPMENT

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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 July 23, 1983 and granted September 25, 1985. A European patent lasts at most 20 years from filing, so its term ended July 23, 2003.
  • 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 January 23, 2009.
  • 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.
FiledJuly 23, 1983
PublishedMarch 14, 1984
GrantedSeptember 25, 1985
Term endedJuly 23, 2003
Application numberEP 83107233
Classification (CPC)C01B39/48 +2 more

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedJuly 23, 1983PublishedMarch 14, 1984Patent grantedSep 25, 1985Term endedJuly 23, 2003

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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