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Expired European patentEurope

Ceramics comprising al2o3, y2o3, zro2 and/or hfo2, and nb2o5 and/or ta2o5 and methods of making the same

EP 1670731 B1 · Applicant: 3M Innovative Properties Company

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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 July 6, 2004 and granted February 24, 2010. A European patent lasts at most 20 years from filing, so its term ended July 6, 2024.
  • Supplementary protection certificates extend only medicine and crop-protection patents, and it isn't classified as either.
  • 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.
FiledJuly 6, 2004
PublishedJune 21, 2006
GrantedFebruary 24, 2010
Term endedJuly 6, 2024
Application numberEP 04786041
Classification (CPC)C03C3/125

Timeline

Timeline From EPO dates

2005200720092011201320152017201920212023Application filedJuly 6, 2004PublishedJune 21, 2006Patent grantedFeb 24, 2010Term endedJuly 6, 2024

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

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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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