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Expired European patentEurope

Ultrasonic diagnostic apparatus capable of acquiring high quality image by correcting phase distortion contained in ultrasonic pulses

EP 0477571 B1 · Applicant: KABUSHIKI KAISHA TOSHIBA

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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 August 28, 1991 and granted March 21, 2001. A European patent lasts at most 20 years from filing, so its term ended August 28, 2011.
  • 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 February 28, 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.
FiledAugust 28, 1991
PublishedApril 1, 1992
GrantedMarch 21, 2001
Term endedAugust 28, 2011
Application numberEP 91114462
Classification (CPC)G01S7/52085 +2 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedAug 28, 1991PublishedApril 1, 1992Patent grantedMarch 21, 2001Term endedAug 28, 2011

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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