Granted Patent
Utility
US 5,215,580 · App. 07/835,749
Process for the production of a fine particle titanium dioxide
Inventors:
Lothar Elfenthal, Edgar Klein, Franz Rosendahl
Patented Case
View Patent ↗
Granted: Jun 1, 1993
Filed: Feb 6, 1992
Inventors
Lothar Elfenthal
Edgar Klein
Franz Rosendahl
Assignee (at issue)
Kronos USA, Inc.
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.