Alexander Sieber

Person

Frankfurt, DE

People

Patents Grantslast 30 patents

Information Patent Grant
Pigment combinations for inks for the intaglio printing of illustra...
- Patent number 6,110,267
- Issue date Aug 29, 2000
- Clariant GmbH
- Rainer Winter
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Surfactants based on hydroxynaphthoic esters and preparation and us...
- Patent number 5,194,665
- Issue date Mar 16, 1993
- Hoechst AG.
- Heinz Uhrig
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Quinacridones having selectively adjusted triboelectric effects
- Patent number 5,137,576
- Issue date Aug 11, 1992
- Hoechst Aktiengesellschaft
- Hans-Tobias Macholdt
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Use of colorants for recording fluids
- Patent number 5,102,459
- Issue date Apr 7, 1992
- Hoechst Aktiengesellschaft
- Josef Ritter
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Process for enhancing the electrostatic chargeability of powder coa...
- Patent number 5,073,579
- Issue date Dec 17, 1991
- Hoechst Aktiengesellschaft
- Hans-Tobias Macholdt
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Use of colorless, intensely fluorinated ammonium and iminium compou...
- Patent number 5,069,994
- Issue date Dec 3, 1991
- Hoechst Aktiengesellschaft
- Jorg Gitzel
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Blue coloring agent for electro-photographic copying processes with...
- Patent number 5,061,585
- Issue date Oct 29, 1991
- Hoechst Aktiengesellschaft
- Hans-Tobias Macholdt
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Process for enhancing the electrostatic chargeability of powder coa...
- Patent number 5,021,473
- Issue date Jun 4, 1991
- Hoechst Aktiengesellschaft
- Hans-Tobias Macholdt
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Process for enhancing the electrostatic chargeability of powder coa...
- Patent number 5,015,676
- Issue date May 14, 1991
- Hoechst Aktiengesellschaft
- Hans-Tobias Macholdt
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Surfactants based on hydroxynaphthoic esters and preparation and us...
- Patent number 4,980,425
- Issue date Dec 25, 1990
- Hoechst Aktiengesellschaft
- Heinz Uhrig
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Specifically influencing the triboelectric effect of azo pigments
- Patent number 4,957,841
- Issue date Sep 18, 1990
- Hoechst Aktiengesellschaft
- Hans-Tobias Macholdt
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Pasty pigment formulations, production and use thereof
- Patent number 4,859,728
- Issue date Aug 22, 1989
- Hoechst Aktiengesellschaft
- Manfred Schneider
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Pigment for electrophotographic recording processes
- Patent number 4,786,575
- Issue date Nov 22, 1988
- Hoechst Aktiengesellschaft
- Hans-Tobias Macholdt
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Magenta colorant for electrophotographic recording processes
- Patent number 4,777,105
- Issue date Oct 11, 1988
- Hoechst Aktiengesellschaft
- Hans-Tobias Macholdt
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Alexander Sieber

Person

Patents Grantslast 30 patents

Pigment combinations for inks for the intaglio printing of illustra...

Surfactants based on hydroxynaphthoic esters and preparation and us...

Quinacridones having selectively adjusted triboelectric effects

Use of colorants for recording fluids

Process for enhancing the electrostatic chargeability of powder coa...

Use of colorless, intensely fluorinated ammonium and iminium compou...

Blue coloring agent for electro-photographic copying processes with...

Process for enhancing the electrostatic chargeability of powder coa...

Process for enhancing the electrostatic chargeability of powder coa...

Surfactants based on hydroxynaphthoic esters and preparation and us...

Specifically influencing the triboelectric effect of azo pigments

Pasty pigment formulations, production and use thereof

Pigment for electrophotographic recording processes

Magenta colorant for electrophotographic recording processes