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Expired European patentEurope

Method in the processing of aluminium and the use of certain acids in oils therefor

EP 0372016 B1 · Applicant: NYNÄS INDUSTRI AB

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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 February 13, 1989 and granted March 4, 1992. A European patent lasts at most 20 years from filing, so its term ended February 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 August 13, 2014.
  • 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.
FiledFebruary 13, 1989
PublishedJune 13, 1990
GrantedMarch 4, 1992
Term endedFebruary 13, 2009
Application numberEP 89902560
Classification (CPC)C10M129/52 +2 more

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedFeb 13, 1989PublishedJune 13, 1990Patent grantedMarch 4, 1992Term endedFeb 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

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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