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Expired European patentEurope

Zirlo material composition and fabrication processing

EP 0475159 B1 · Applicant: WESTINGHOUSE ELECTRIC 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 August 23, 1991 and granted October 16, 1996. A European patent lasts at most 20 years from filing, so its term ended August 23, 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 23, 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 23, 1991
PublishedMarch 18, 1992
GrantedOctober 16, 1996
Term endedAugust 23, 2011
Application numberEP 91114158
Classification (CPC)C22F1/186 +1 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedAug 23, 1991PublishedMarch 18, 1992Patent grantedOct 16, 1996Term endedAug 23, 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

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