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Expired European patentEurope

Method for preparing sterically hindered aryl phosphites

EP 0504320 B1 · Applicant: UNIROYAL CHEMICAL COMPANY, Inc.

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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 November 13, 1990 and granted September 21, 1994. A European patent lasts at most 20 years from filing, so its term ended November 13, 2010.
  • 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 May 13, 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.
FiledNovember 13, 1990
PublishedSeptember 23, 1992
GrantedSeptember 21, 1994
Term endedNovember 13, 2010
Application numberEP 91902632
Classification (CPC)C07F9/145

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedNov 13, 1990PublishedSep 23, 1992Patent grantedSep 21, 1994Term endedNov 13, 2010

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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