Gerhard Franz

Person

Krefeld, DE

People

Patents Grantslast 30 patents

Information Patent Grant
Low coercive iron oxide pigments and a process for their preparation
- Patent number 5,480,570
- Issue date Jan 2, 1996
- Toda Kogyo Corp.
- Karl-Heinz van Bonn
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of silicon nitride
- Patent number 5,075,091
- Issue date Dec 24, 1991
- Bayer Aktiengesellschaft
- Lothar Schonfelder
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Silicon nitride powders of low isoelectric point and processes for...
- Patent number 5,066,473
- Issue date Nov 19, 1991
- Bayer Aktiengesellschaft
- Ulrike Pitzer
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
SI C powder, a process for its production and its use
- Patent number 5,039,632
- Issue date Aug 13, 1991
- Bayer AG
- Ralf Riedel
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Silicon nitride powders with improved surface properties and proces...
- Patent number 5,030,434
- Issue date Jul 9, 1991
- Bayer Aktiengesellschaft
- Ulrike Pitzer
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Silicon nitride powder of low oxygen content
- Patent number 4,983,371
- Issue date Jan 8, 1991
- Bayer Aktiengesellschaft
- Ulrike Pitzer
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Sinterable SI.sub.3 N.sub.4 powders containing sintering additives...
- Patent number 4,980,322
- Issue date Dec 25, 1990
- Bayer Aktiengesellschaft
- Ulrike Wickel
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Process for the preparation of finely divided carbides and nitrides...
- Patent number 4,948,762
- Issue date Aug 14, 1990
- Bayer Aktiengesellschaft
- Wolfgang Krumbe
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Sinterable Si.sub.3 N.sub.4 powder and a process for its preparation
- Patent number 4,845,060
- Issue date Jul 4, 1989
- Bayer Aktiengesellschaft
- Ulrike Wickel
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Process for the preparation of silicon nitride low in carbon content
- Patent number 4,798,714
- Issue date Jan 17, 1989
- Bayer Aktiengesellschaft
- Lothar Schonfelder
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Process for the production of yellow-brown zinc ferrite pigments
- Patent number 4,681,637
- Issue date Jul 21, 1987
- Bayer Aktiengesellschaft
- Jakob Rademachers
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Lamellar iron oxide pigments, a process for the production thereof...
- Patent number 4,676,838
- Issue date Jun 30, 1987
- Bayer Aktiengesellschaft
- Gerhard Franz
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Production of lamellar iron oxide pigments
- Patent number 4,404,254
- Issue date Sep 13, 1983
- Bayer Aktiengesellschaft
- Gerhard Franz
- C01 - INORGANIC CHEMISTRY

Gerhard Franz

Person

Patents Grantslast 30 patents

Low coercive iron oxide pigments and a process for their preparation

Process for the preparation of silicon nitride

Silicon nitride powders of low isoelectric point and processes for...

SI C powder, a process for its production and its use

Silicon nitride powders with improved surface properties and proces...

Silicon nitride powder of low oxygen content

Sinterable SI.sub.3 N.sub.4 powders containing sintering additives...

Process for the preparation of finely divided carbides and nitrides...

Sinterable Si.sub.3 N.sub.4 powder and a process for its preparation

Process for the preparation of silicon nitride low in carbon content

Process for the production of yellow-brown zinc ferrite pigments

Lamellar iron oxide pigments, a process for the production thereof...

Production of lamellar iron oxide pigments