Patent Yard Sign in
Expired European patentEurope

Optical telecommunication element

EP 0037129 B1 · Applicant: Philips Electronics N.V.

EPO PDF

Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

Read the whole patent

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.

Google PatentsEPO PDF

Why it's free to use

  • Filed February 19, 1981 and granted May 8, 1985. A European patent lasts at most 20 years from filing, so its term ended February 19, 2001.
  • 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 19, 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.
FiledFebruary 19, 1981
PublishedOctober 7, 1981
GrantedMay 8, 1985
Term endedFebruary 19, 2001
Application numberEP 81200192
Classification (CPC)G02B6/4405

Timeline

Timeline From EPO dates

1982198419861988199019921994199619982000Application filedFeb 19, 1981PublishedOct 7, 1981Patent grantedMay 8, 1985Term endedFeb 19, 2001

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.