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Expired European patentEurope

A laminar structure for administering a chemical at a controlled release rate

EP 0243891 B1 · Applicant: HOECHST-ROUSSEL PHARMACEUTICALS INCORPORATED

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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 April 24, 1987 and granted August 14, 1991. A European patent lasts at most 20 years from filing, so its term ended April 24, 2007.
  • 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 24, 2012.
  • 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 24, 1987
PublishedNovember 4, 1987
GrantedAugust 14, 1991
Term endedApril 24, 2007
Application numberEP 87105983
Classification (CPC)A61M31/002 +1 more

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedApril 24, 1987PublishedNov 4, 1987Patent grantedAug 14, 1991Term endedApril 24, 2007

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.