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Expired European patentEurope

Pattern forming material and method for forming pattern therewith

EP 0122398 B1 · Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

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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 February 17, 1984 and granted December 13, 1989. A European patent lasts at most 20 years from filing, so its term ended February 17, 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 August 17, 2009.
  • 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.
FiledFebruary 17, 1984
PublishedOctober 24, 1984
GrantedDecember 13, 1989
Term endedFebruary 17, 2004
Application numberEP 84101686
Classification (CPC)C08G77/20 +2 more

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedFeb 17, 1984PublishedOct 24, 1984Patent grantedDec 13, 1989Term endedFeb 17, 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

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