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Expired European patentEurope

Retroreflective material with improved angularity

EP 0548280 B1 · Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY

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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 July 29, 1991 and granted September 21, 1994. A European patent lasts at most 20 years from filing, so its term ended July 29, 2011.
  • 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 January 29, 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.
FiledJuly 29, 1991
PublishedJune 30, 1993
GrantedSeptember 21, 1994
Term endedJuly 29, 2011
Application numberEP 91918872
Classification (CPC)G02B5/122 +1 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedJuly 29, 1991PublishedJune 30, 1993Patent grantedSep 21, 1994Term endedJuly 29, 2011

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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