Granted Patent
Utility
US 6,074,754 · App. 08/970,760
Spherical pigments, process for producing them and use thereof
Inventors:
Hauke Jacobsen, Werner Hartmann, Stipan Katusic, Andreas Schulz, Norbert Giesecke, Ralph Brandes, Jorg Sperlich
Patented Case
View Patent ↗
Granted: Jun 13, 2000
Filed: Nov 14, 1997
Inventors
Hauke Jacobsen
Werner Hartmann
Stipan Katusic
Andreas Schulz
Norbert Giesecke
Ralph Brandes
Jorg Sperlich
Assignee (at issue)
Degussa AG
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.