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Expired European patentEurope

Method for extending the activity of acidic ion exchange catalysts

EP 0682004 B1 · Applicant: GENERAL ELECTRIC COMPANY

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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 April 18, 1995 and granted July 29, 1998. A European patent lasts at most 20 years from filing, so its term ended April 18, 2015.
  • 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 October 18, 2020.
  • 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.
FiledApril 18, 1995
PublishedNovember 15, 1995
GrantedJuly 29, 1998
Term endedApril 18, 2015
Application numberEP 95302534
Classification (CPC)C07C37/20

Timeline

Timeline From EPO dates

1996199820002002200420062008201020122014Application filedApril 18, 1995PublishedNov 15, 1995Patent grantedJuly 29, 1998Term endedApril 18, 2015

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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