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Expired European patentEurope

Method of and aparatus for measuring the transverse moments of the electromagnetic field associated with an optical beam

EP 0184802 B1 · Applicant: CSELT Centro Studi e Laboratori Telecomunicazioni S.p.A.

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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 December 9, 1985 and granted August 28, 1991. A European patent lasts at most 20 years from filing, so its term ended December 9, 2005.
  • 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 June 9, 2011.
  • 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.
FiledDecember 9, 1985
PublishedJune 18, 1986
GrantedAugust 28, 1991
Term endedDecember 9, 2005
Application numberEP 85115617
Classification (CPC)G01J1/4257

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedDec 9, 1985PublishedJune 18, 1986Patent grantedAug 28, 1991Term endedDec 9, 2005

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

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