Leonardus J. H. Erkens

Person

CK Maastricht, NL

People

Patents Grantslast 30 patents

Information Patent Grant
Easily distributable pigment compositions
- Patent number 6,734,231
- Issue date May 11, 2004
- Ciba Specialty Chemicals Corporation
- Gerardus Lambertus Creusen
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Red-tinged bismuth vanadate pigments
- Patent number 6,444,025
- Issue date Sep 3, 2002
- Ciba Specialty Chemicals Corporation
- Leonardus Johannes Hubertus Erkens
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Bismuth vanadate pigment powder mixtures
- Patent number 5,976,238
- Issue date Nov 2, 1999
- Ciba Specialty Chemicals Corporation
- Leonardus Johannes Hubertus Erkens
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Transparent bismuth vanadate pigments
- Patent number 5,853,472
- Issue date Dec 29, 1998
- Ciba Specialty Chemicals Corporation
- Leonardus Johannes Hubertus Erkens
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Process for stabilizing bismuth vanadate pigments against attack by...
- Patent number 5,123,965
- Issue date Jun 23, 1992
- Ciba-Geigy Corporation
- Fritz Herren
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Novel process for the preparation of lead molybdate pigments and no...
- Patent number 5,007,963
- Issue date Apr 16, 1991
- Ciba-Geigy Corporation
- Leonardus J. H. Erkens
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Orthorhombic greenish-tinged lead chromate pigments
- Patent number 4,921,541
- Issue date May 1, 1990
- Ciba-Geigy Corporation
- Leonardus J. H. Erkens
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Orthorhombic lead chromate pigments of greenish hue
- Patent number 4,872,915
- Issue date Oct 10, 1989
- Ciba-Geigy Corporation
- Leonardus J. H. Erkens
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Iron blue pigment composition and process for its production
- Patent number 4,113,508
- Issue date Sep 12, 1978
- Hercules Incorporated
- Johan Jozef Einerhand
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Synthesis of metal phthalocyanines
- Patent number 4,077,973
- Issue date Mar 7, 1978
- Hercules Incorporated
- Gerardus Johannes Baptist Colbers
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...

Patents Applicationslast 30 patents

Information Patent Application
Easily distributable pigment compositions
- Publication number 20030033958
- Publication date Feb 20, 2003
- Gerardus Lambertus Creusen
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...

Leonardus J. H. Erkens

Person

Patents Grantslast 30 patents

Easily distributable pigment compositions

Red-tinged bismuth vanadate pigments

Bismuth vanadate pigment powder mixtures

Transparent bismuth vanadate pigments

Process for stabilizing bismuth vanadate pigments against attack by...

Novel process for the preparation of lead molybdate pigments and no...

Orthorhombic greenish-tinged lead chromate pigments

Orthorhombic lead chromate pigments of greenish hue

Iron blue pigment composition and process for its production

Synthesis of metal phthalocyanines

Patents Applicationslast 30 patents

Easily distributable pigment compositions