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Expired European patentEurope

Yellow dental alloy with a high gold content

EP 0478932 B1 · Applicant: Degussa Aktiengesellschaft

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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 August 13, 1991 and granted December 15, 1993. A European patent lasts at most 20 years from filing, so its term ended August 13, 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 February 13, 2017.
  • 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.
FiledAugust 13, 1991
PublishedApril 8, 1992
GrantedDecember 15, 1993
Term endedAugust 13, 2011
Application numberEP 91113530
Classification (CPC)C22C5/02 +1 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedAug 13, 1991PublishedApril 8, 1992Patent grantedDec 15, 1993Term endedAug 13, 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

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