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Expired European patentEurope

Transition metal-containing zeolite having high hydrothermal stability, production method thereof and method of using same

EP 0462598 B1 · Applicant: Tosoh Corporation

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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 June 19, 1991 and granted April 2, 1997. A European patent lasts at most 20 years from filing, so its term ended June 19, 2011.
  • 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 December 19, 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.
FiledJune 19, 1991
PublishedDecember 27, 1991
GrantedApril 2, 1997
Term endedJune 19, 2011
Application numberEP 91110088
Classification (CPC)C01B39/026 +2 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedJune 19, 1991PublishedDec 27, 1991Patent grantedApril 2, 1997Term endedJune 19, 2011

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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