Invention Grant
US2447222A Metallizable polyazo dyestuffs and a process for their preparation 失效
可金属化的多偶氮染料及其制备方法

  • Patent Title: Metallizable polyazo dyestuffs and a process for their preparation
  • Patent Title (中): 可金属化的多偶氮染料及其制备方法
  • Application No.: US54281044
    Application Date: 1944-06-29
  • Publication No.: US2447222A
    Publication Date: 1948-08-17
  • Inventor: WALTER WEHRLICHARLES PETITJEAN
  • Applicant: SANDOZ LTD
  • Assignee: Sandoz Ltd
  • Current Assignee: Sandoz Ltd
  • Priority: CH2447222X 1943-07-02
  • Main IPC: C09B35/40
  • IPC: C09B35/40
Metallizable polyazo dyestuffs and a process for their preparation
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