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Expired European patentEurope

Multilayer mirror for reflecting radiation at a preselected wavelength

EP 0027331 B1 · Applicant: OPTICAL COATING LABORATORY, 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 September 30, 1980 and granted December 17, 1986. A European patent lasts at most 20 years from filing, so its term ended September 30, 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 March 30, 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.
FiledSeptember 30, 1980
PublishedApril 22, 1981
GrantedDecember 17, 1986
Term endedSeptember 30, 2000
Application numberEP 80303444
Classification (CPC)G02B5/26 +2 more

Timeline

Timeline From EPO dates

1981198319851987198919911993199519971999Application filedSep 30, 1980PublishedApril 22, 1981Patent grantedDec 17, 1986Term endedSep 30, 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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