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Expired European patentEurope

Rotor made of aluminum alloy for oil pump and method of manufacturing said rotor

EP 0533950 B1 · Applicant: SUMITOMO ELECTRIC 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 April 3, 1992 and granted August 20, 1997. A European patent lasts at most 20 years from filing, so its term ended April 3, 2012.
  • 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 October 3, 2017.
  • 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.
FiledApril 3, 1992
PublishedMarch 31, 1993
GrantedAugust 20, 1997
Term endedApril 3, 2012
Application numberEP 92907999
Classification (CPC)B22F3/20 +2 more

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedApril 3, 1992PublishedMarch 31, 1993Patent grantedAug 20, 1997Term endedApril 3, 2012

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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