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Expired European patentEurope

Use of nickel base alloy having high resistance to stress corrosion cracking

EP 0056480 B1 · Applicant: Hitachi, Ltd.

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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 December 22, 1981 and granted October 29, 1986. A European patent lasts at most 20 years from filing, so its term ended December 22, 2001.
  • 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 June 22, 2007.
  • 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.
FiledDecember 22, 1981
PublishedJuly 28, 1982
GrantedOctober 29, 1986
Term endedDecember 22, 2001
Application numberEP 81110688
Classification (CPC)C22C19/055

Timeline

Timeline From EPO dates

1982198419861988199019921994199619982000Application filedDec 22, 1981PublishedJuly 28, 1982Patent grantedOct 29, 1986Term endedDec 22, 2001

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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