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Expired European patentEurope

Alkali metal 8,9-dehydroestrone sulfate esters

EP 0628052 B1 · Applicant: AMERICAN HOME PRODUCTS CORPORATION

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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 February 19, 1993 and granted December 9, 1998. A European patent lasts at most 20 years from filing, so its term ended February 19, 2013.
  • 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 August 19, 2018.
  • 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.
FiledFebruary 19, 1993
PublishedDecember 14, 1994
GrantedDecember 9, 1998
Term endedFebruary 19, 2013
Application numberEP 93906093
Classification (CPC)A61P15/00 +2 more

Timeline

Timeline From EPO dates

1994199619982000200220042006200820102012Application filedFeb 19, 1993PublishedDec 14, 1994Patent grantedDec 9, 1998Term endedFeb 19, 2013

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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