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Expired European patentEurope

Continuous process for the production of 4-amino-2,2,6,6-tetramethylpiperidine

EP 0776887 B1 · Applicant: HÜLS AKTIENGESELLSCHAFT

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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 27, 1996 and granted March 29, 2000. A European patent lasts at most 20 years from filing, so its term ended September 27, 2016.
  • 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 27, 2022.
  • 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 27, 1996
PublishedJune 4, 1997
GrantedMarch 29, 2000
Term endedSeptember 27, 2016
Application numberEP 96115523
Classification (CPC)C07D211/58

Timeline

Timeline From EPO dates

1997199920012003200520072009201120132015Application filedSep 27, 1996PublishedJune 4, 1997Patent grantedMarch 29, 2000Term endedSep 27, 2016

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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