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Expired European patentEurope

Dehydration process

EP 0454002 B1 · Applicant: F. HOFFMANN-LA ROCHE AG

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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 20, 1991 and granted June 28, 1995. A European patent lasts at most 20 years from filing, so its term ended April 20, 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 October 20, 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.
FiledApril 20, 1991
PublishedOctober 30, 1991
GrantedJune 28, 1995
Term endedApril 20, 2011
Application numberEP 91106384
Classification (CPC)C07C403/12

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedApril 20, 1991PublishedOct 30, 1991Patent grantedJune 28, 1995Term endedApril 20, 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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