Walter Helmling

Person

Hofheim am Taunus, DE

People

Patents Grantslast 30 patents

Information Patent Grant
Water-soluble monoazo compounds containing a p-aminophenylamino- an...
- Patent number 5,003,053
- Issue date Mar 26, 1991
- Hoechst Aktiengesellschaft
- Hartmut Springer
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Precursors for the preparation of water-soluble triphendioxazine dy...
- Patent number 4,898,944
- Issue date Feb 6, 1990
- Hoechst Aktiengesellschaft
- Gunther Schwaiger
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Precursors for synthesis of triphendioxazine dyestuffs
- Patent number 4,895,954
- Issue date Jan 23, 1990
- Hoechst Aktiengesellschaft
- Gunther Schwaiger
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Sulfonyl containing compounds suitable as precurors for water-solub...
- Patent number 4,885,385
- Issue date Dec 5, 1989
- Hoechst Aktiengesellschaft
- Hartmut Springer
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Water-soluble triphendioxazine compounds
- Patent number 4,851,527
- Issue date Jul 25, 1989
- Hoechst Aktiengesellschaft
- Hartmut Springer
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Water-soluble triphendioxazine compounds
- Patent number 4,816,574
- Issue date Mar 28, 1989
- Hoechst Aktiengesellschaft
- Gunther Schwaiger
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Water-soluble triphendioxazine compounds
- Patent number 4,786,728
- Issue date Nov 22, 1988
- Hoechst Aktiengesellschaft
- Gunther Schwaiger
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Water-soluble triphendioxazine compounds
- Patent number 4,785,099
- Issue date Nov 15, 1988
- Hoechst Aktiengesellschaft
- Hartmut Springer
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Water-soluble triphendioxazine compounds
- Patent number 4,782,150
- Issue date Nov 1, 1988
- Hoechst Aktiengesellschaft
- Hartmut Springer
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Water-soluble triphendioxazine compounds and sulfonyl-containing pr...
- Patent number 4,774,333
- Issue date Sep 27, 1988
- Hoechst Aktiengesellschaft
- Hartmut Springer
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...

Walter Helmling

Person

Patents Grantslast 30 patents

Water-soluble monoazo compounds containing a p-aminophenylamino- an...

Precursors for the preparation of water-soluble triphendioxazine dy...

Precursors for synthesis of triphendioxazine dyestuffs

Sulfonyl containing compounds suitable as precurors for water-solub...

Water-soluble triphendioxazine compounds

Water-soluble triphendioxazine compounds

Water-soluble triphendioxazine compounds

Water-soluble triphendioxazine compounds

Water-soluble triphendioxazine compounds

Water-soluble triphendioxazine compounds and sulfonyl-containing pr...