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Expired European patentEurope

Stabilization of methacrylic polymers against sterilizing radiation

EP 0449502 B1 · Applicant: ROHM AND HAAS 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 March 20, 1991 and granted March 8, 1995. A European patent lasts at most 20 years from filing, so its term ended March 20, 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 September 20, 2016.
  • 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.
FiledMarch 20, 1991
PublishedOctober 2, 1991
GrantedMarch 8, 1995
Term endedMarch 20, 2011
Application numberEP 91302452
Classification (CPC)C08F2/44 +2 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedMarch 20, 1991PublishedOct 2, 1991Patent grantedMarch 8, 1995Term endedMarch 20, 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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