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Expired European patentEurope

Catalytic hydrogenation of di-(4-aminophenyl) methane

EP 0066211 B1 · Applicant: Mobay Chemical Corporation

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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 May 21, 1982 and granted September 12, 1984. A European patent lasts at most 20 years from filing, so its term ended May 21, 2002.
  • 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 November 21, 2007.
  • 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.
FiledMay 21, 1982
PublishedDecember 8, 1982
GrantedSeptember 12, 1984
Term endedMay 21, 2002
Application numberEP 82104442
Classification (CPC)C07C209/72

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedMay 21, 1982PublishedDec 8, 1982Patent grantedSep 12, 1984Term endedMay 21, 2002

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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