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Expired European patentEurope

Use of cromakalim/brl 38227 for the treatment of hyperreactivity of airways

EP 0471040 B1 · Applicant: Beecham Group p.l.c.

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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 December 11, 1990 and granted March 12, 1997. A European patent lasts at most 20 years from filing, so its term ended December 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 June 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.
FiledDecember 11, 1990
PublishedFebruary 19, 1992
GrantedMarch 12, 1997
Term endedDecember 11, 2010
Application numberEP 91900304
Classification (CPC)A61K31/40

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedDec 11, 1990PublishedFeb 19, 1992Patent grantedMarch 12, 1997Term endedDec 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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