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Expired European patentEurope

High resolution, marine seismic stratigraphic system

EP 0057675 B1 · Applicant: FAIRFIELD INDUSTRIES, INC.

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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 July 24, 1980 and granted February 25, 1987. A European patent lasts at most 20 years from filing, so its term ended July 24, 2000.
  • 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 January 24, 2006.
  • 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.
FiledJuly 24, 1980
PublishedAugust 18, 1982
GrantedFebruary 25, 1987
Term endedJuly 24, 2000
Application numberEP 80901565
Classification (CPC)G01V1/3808 +1 more

Timeline

Timeline From EPO dates

1981198319851987198919911993199519971999Application filedJuly 24, 1980PublishedAug 18, 1982Patent grantedFeb 25, 1987Term endedJuly 24, 2000

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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