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Expired European patentEurope

Optical waveguide fiber with titania-silica outer cladding and method of manufacturing

EP 0443112 B1 · Applicant: CORNING INCORPORATED

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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 November 27, 1990 and granted August 30, 1995. A European patent lasts at most 20 years from filing, so its term ended November 27, 2010.
  • 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 27, 2016.
  • 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 27, 1990
PublishedAugust 28, 1991
GrantedAugust 30, 1995
Term endedNovember 27, 2010
Application numberEP 90122611
Classification (CPC)C03B37/014 +2 more

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedNov 27, 1990PublishedAug 28, 1991Patent grantedAug 30, 1995Term endedNov 27, 2010

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.