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EP 0028329 B1 · Applicant: TOYODA KOKI KABUSHIKI KAISHA

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Overview

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

Read the whole patent

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.

Why it's free to use

  • Filed October 13, 1980 and granted October 24, 1984. A European patent lasts at most 20 years from filing, so its term ended October 13, 2000.
  • 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 April 13, 2006.
  • 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.
FiledOctober 13, 1980
PublishedMay 13, 1981
GrantedOctober 24, 1984
Term endedOctober 13, 2000
Application numberEP 80106222
Classification (CPC)B23Q3/15526

Timeline

Timeline From EPO dates

1981198319851987198919911993199519971999Application filedOct 13, 1980PublishedMay 13, 1981Patent grantedOct 24, 1984Term endedOct 13, 2000

Sources & verification