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EP 0089751 B1 · Applicant: Corning Glass Works

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Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

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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 22, 1983 and granted May 6, 1987. A European patent lasts at most 20 years from filing, so its term ended February 22, 2003.
  • 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 22, 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.
FiledFebruary 22, 1983
PublishedSeptember 28, 1983
GrantedMay 6, 1987
Term endedFebruary 22, 2003
Application numberEP 83300915
Classification (CPC)B01D46/0039 +2 more

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedFeb 22, 1983PublishedSep 28, 1983Patent grantedMay 6, 1987Term endedFeb 22, 2003

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.