Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Heat-stable iron oxide black pigments, processes for their production and their use

Heat-stable iron oxide black pigments, processes for their production and their use

US Patent 5055136 · Granted Oct 8, 1991

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Thermally stable iron oxide pigments, a process for their preparation and their 1997
Pure-colored iron oxide direct red pigments, a process for their production and 1995
Red ceramic moulded bodies as well as processes for their production1995
Process for dyeing asphalt1995
Transparent iron oxide pigments, processes for their production and their use1994
Thermostable iron oxide pigments, processes for their production, as well as the1994
Temperature-resistant black pigment, a process for its production and its use1993
Boron-containing iron oxide pigments and a process for their preparation1993
Process for coloring building materials1993
Process for the preparation of isometric magnetic iron oxide1993
Process for the preparation of isometric magnetic iron oxide1993
Black manganese/iron oxide pigment a process for its production and its use1992