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Expired European patentEurope

Micronutrient fertilizers and method of growing plants

EP 0023364 B1 · Applicant: Board of Regents of the Oklahoma Agricultural and Mechanical Coll. acting for the Oklahoma State Univ. of Agric. and Appl. Sc.

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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 July 30, 1980 and granted March 28, 1984. A European patent lasts at most 20 years from filing, so its term ended July 30, 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 January 30, 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.
FiledJuly 30, 1980
PublishedFebruary 4, 1981
GrantedMarch 28, 1984
Term endedJuly 30, 2000
Application numberEP 80104504
Classification (CPC)C05D9/02

Timeline

Timeline From EPO dates

1981198319851987198919911993199519971999Application filedJuly 30, 1980PublishedFeb 4, 1981Patent grantedMarch 28, 1984Term endedJuly 30, 2000

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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