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Expired European patentEurope

Liquid mixture for absorbing and stabilizing gas bubbles to be used as contrast agent in ultrasonic diagnosis and process for its preparation

EP 0077752 B1 · Applicant: SCHERING AKTIENGESELLSCHAFT

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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 October 13, 1982 and granted March 5, 1986. A European patent lasts at most 20 years from filing, so its term ended October 13, 2002.
  • 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 April 13, 2008.
  • 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.
FiledOctober 13, 1982
PublishedApril 27, 1983
GrantedMarch 5, 1986
Term endedOctober 13, 2002
Application numberEP 82730129
Classification (CPC)A61K49/223

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedOct 13, 1982PublishedApril 27, 1983Patent grantedMarch 5, 1986Term endedOct 13, 2002

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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