Invention Grant
- Patent Title: Pyrazolone azo-dyestuffs insoluble in water
- Patent Title (中): 吡唑啉酮偶氮染料不溶于水
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Application No.: US29128552Application Date: 1952-06-02
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Publication No.: US2742458APublication Date: 1956-04-17
- Inventor: GERHARD LANGBEIN
- Applicant: HOECHST AG
- Assignee: Hoechst AG
- Current Assignee: Hoechst AG
- Priority: DE2742458X 1951-06-02
- Main IPC: C09B33/02
- IPC: C09B33/02 ; C09B33/22
Public/Granted literature
- USD439677S1 Paver stone Public/Granted day:2001-03-27
Information query
