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Expired European patentEurope

Composition for and method of making picture tube fluorescent screen

EP 0081680 B1 · Applicant: KABUSHIKI KAISHA TOSHIBA

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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 November 10, 1982 and granted August 26, 1987. A European patent lasts at most 20 years from filing, so its term ended November 10, 2002.
  • 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 May 10, 2008.
  • 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.
FiledNovember 10, 1982
PublishedJune 22, 1983
GrantedAugust 26, 1987
Term endedNovember 10, 2002
Application numberEP 82110360
Classification (CPC)G03F7/032 +1 more

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedNov 10, 1982PublishedJune 22, 1983Patent grantedAug 26, 1987Term endedNov 10, 2002

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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