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Manufacturing method of preformes for polymeric optical fibres with an index jump, preform so manufactured and its application

EP 0151363 A1 · Applicant: Bosc, Dominique

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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 20, 1984 and never granted as a European patent. Had it been granted, its 20-year term would have ended December 20, 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 20, 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 20, 1984
PublishedAugust 14, 1985
GrantedNever granted
Term endedDecember 20, 2004
Application numberEP 84402680
Classification (CPC)B29D11/00721

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedDec 20, 1984PublishedAug 14, 1985Term endedDec 20, 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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