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Expired European patentEurope

Micro-grooves for the design of wideband clinical ultrasonic transducers

EP 0629994 B1 · Applicant: Hewlett-Packard Company

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Overview

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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 June 14, 1994 and granted December 11, 1996. A European patent lasts at most 20 years from filing, so its term ended June 14, 2014.
  • 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 December 14, 2019.
  • 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.
FiledJune 14, 1994
PublishedDecember 21, 1994
GrantedDecember 11, 1996
Term endedJune 14, 2014
Application numberEP 94304297
Classification (CPC)G10K11/02 +1 more

Timeline

Timeline From EPO dates

1995199719992001200320052007200920112013Application filedJune 14, 1994PublishedDec 21, 1994Patent grantedDec 11, 1996Term endedJune 14, 2014

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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