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Coded-fringe interferometric method and device for wavefront detection in optics

EP 0452283 A2 · Applicant: Officine Galileo S.p.A.

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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 April 10, 1991 and never granted as a European patent. Had it been granted, its 20-year term would have ended April 10, 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 October 10, 2016.
  • 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 10, 1991
PublishedOctober 16, 1991
GrantedNever granted
Term endedApril 10, 2011
Application numberEP 91830141
Classification (CPC)G01J9/02

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedApril 10, 1991PublishedOct 16, 1991Term endedApril 10, 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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