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Expired European patentEurope

Method of multiplicating plant seedlings

EP 0276575 B1 · Applicant: MITSUI PETROCHEMICAL INDUSTRIES, LTD.

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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 24, 1987 and granted March 4, 1992. A European patent lasts at most 20 years from filing, so its term ended December 24, 2007.
  • 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 24, 2013.
  • 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 24, 1987
PublishedAugust 3, 1988
GrantedMarch 4, 1992
Term endedDecember 24, 2007
Application numberEP 87311472
Classification (CPC)A01H4/005

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedDec 24, 1987PublishedAug 3, 1988Patent grantedMarch 4, 1992Term endedDec 24, 2007

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

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