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Expired European patentEurope

Process for disproportionating monomethylamine using zeolitic catalyst to produce dimethylamine

EP 0026071 B1 · Applicant: E.I. DU PONT DE NEMOURS AND 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 September 10, 1980 and granted July 27, 1983. A European patent lasts at most 20 years from filing, so its term ended September 10, 2000.
  • 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 March 10, 2006.
  • 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.
FiledSeptember 10, 1980
PublishedApril 1, 1981
GrantedJuly 27, 1983
Term endedSeptember 10, 2000
Application numberEP 80303181
Classification (CPC)C07C209/64

Timeline

Timeline From EPO dates

1981198319851987198919911993199519971999Application filedSep 10, 1980PublishedApril 1, 1981Patent grantedJuly 27, 1983Term endedSep 10, 2000

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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