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Expired European patentEurope

Three-dimensional refractively scanning interferometer structure having removable optical cartridge

EP 0501833 B1 · Applicant: RESEARCH-COTTRELL TECHNOLOGIES INC.

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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 February 28, 1992 and granted June 11, 1997. A European patent lasts at most 20 years from filing, so its term ended February 28, 2012.
  • 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 August 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.
FiledFebruary 28, 1992
PublishedSeptember 2, 1992
GrantedJune 11, 1997
Term endedFebruary 28, 2012
Application numberEP 92301748
Classification (CPC)G01J3/4537

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedFeb 28, 1992PublishedSep 2, 1992Patent grantedJune 11, 1997Term endedFeb 28, 2012

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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