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Expired European patentEurope

Multifocal lens

EP 0193552 B1 · Applicant: Optische Werke G. Rodenstock

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Overview

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

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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 August 19, 1985 and granted October 25, 1989. A European patent lasts at most 20 years from filing, so its term ended August 19, 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 February 19, 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.
FiledAugust 19, 1985
PublishedSeptember 10, 1986
GrantedOctober 25, 1989
Term endedAugust 19, 2005
Application numberEP 85904224
Classification (CPC)G02C7/061 +2 more

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedAug 19, 1985PublishedSep 10, 1986Patent grantedOct 25, 1989Term endedAug 19, 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

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.