Walter Helmling

Follow

Person

Niedemhausen, DE

People

Patents Grantslast 30 patents

Information Patent Grant
Fiber-reactive triphenodioxazine dyes
- Patent number 5,539,109
- Issue date Jul 23, 1996
- Hoechst Celanese Corporation
- Walter Helmling
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Fiber-reactive triphenodioxazine dyes
- Patent number 5,532,362
- Issue date Jul 2, 1996
- Hoechst Celanese Corporation
- Walter Helmling
- C07 - ORGANIC CHEMISTRY