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Expired European patentEurope

Process for the preparation of tertiary butyl hydrazine hydrohalogenide

EP 0779274 B1 · Applicant: JAPAN HYDRAZINE CO., LTD.

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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 December 2, 1996 and granted August 12, 1998. A European patent lasts at most 20 years from filing, so its term ended December 2, 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 June 2, 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.
FiledDecember 2, 1996
PublishedJune 18, 1997
GrantedAugust 12, 1998
Term endedDecember 2, 2016
Application numberEP 96308699
Classification (CPC)C07C241/02

Timeline

Timeline From EPO dates

1997199920012003200520072009201120132015Application filedDec 2, 1996PublishedJune 18, 1997Patent grantedAug 12, 1998Term endedDec 2, 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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