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EP 0088527 B1 · Applicant: Dentsply Research and Development Corporation

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Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

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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 15, 1983 and granted July 22, 1987. A European patent lasts at most 20 years from filing, so its term ended February 15, 2003.
  • 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 15, 2008.
  • 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 15, 1983
PublishedSeptember 14, 1983
GrantedJuly 22, 1987
Term endedFebruary 15, 2003
Application numberEP 83300754
Classification (CPC)C07F9/091

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedFeb 15, 1983PublishedSep 14, 1983Patent grantedJuly 22, 1987Term endedFeb 15, 2003

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.