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Expired European patentEurope

Process for producing aluminum material for use in vacuum

EP 0146115 B1 · Applicant: SHOWA ALUMINUM 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 December 12, 1984 and granted February 22, 1989. A European patent lasts at most 20 years from filing, so its term ended December 12, 2004.
  • 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 12, 2010.
  • 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 12, 1984
PublishedJune 26, 1985
GrantedFebruary 22, 1989
Term endedDecember 12, 2004
Application numberEP 84115294
Classification (CPC)C23C8/02 +2 more

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedDec 12, 1984PublishedJune 26, 1985Patent grantedFeb 22, 1989Term endedDec 12, 2004

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.