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Expired European patentEurope

A distributed parallel processing network wherein the connection weights are generated using stiff differential equations

EP 0449994 B1 · Applicant: E.I. DU PONT DE NEMOURS AND COMPANY

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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 13, 1989 and granted May 10, 1995. A European patent lasts at most 20 years from filing, so its term ended December 13, 2009.
  • 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 13, 2015.
  • 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 13, 1989
PublishedOctober 9, 1991
GrantedMay 10, 1995
Term endedDecember 13, 2009
Application numberEP 90905374
Classification (CPC)G06N3/08 +2 more

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedDec 13, 1989PublishedOct 9, 1991Patent grantedMay 10, 1995Term endedDec 13, 2009

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

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