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Expired European patentEurope

Method for improving durability of mirrors utilizing radiation curable coatings

EP 0272572 B1 · Applicant: PPG INDUSTRIES, 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 December 12, 1987 and granted April 17, 1991. A European patent lasts at most 20 years from filing, so its term ended December 12, 2007.
  • 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 12, 2013.
  • 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 12, 1987
PublishedJune 29, 1988
GrantedApril 17, 1991
Term endedDecember 12, 2007
Application numberEP 87118458
Classification (CPC)G02B5/0808 +2 more

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedDec 12, 1987PublishedJune 29, 1988Patent grantedApril 17, 1991Term endedDec 12, 2007

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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