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Expired European patentEurope

System for floating point operations

EP 0226226 B1 · Applicant: WANG LABORATORIES INC.

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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 December 19, 1986 and granted April 10, 1991. A European patent lasts at most 20 years from filing, so its term ended December 19, 2006.
  • 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 19, 2012.
  • 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 19, 1986
PublishedJune 24, 1987
GrantedApril 10, 1991
Term endedDecember 19, 2006
Application numberEP 86117817
Classification (CPC)G06F9/3885 +1 more

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedDec 19, 1986PublishedJune 24, 1987Patent grantedApril 10, 1991Term endedDec 19, 2006

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.