Granted Patent
Utility
US 4,828,826 · App. 07/111,833
Cosmetic formulations with carrier-free iron oxide platelets
Inventors:
Klaus-Dieter Franz, Andrea Griessmann, Gisela Lenz, Gernot Moschl
Patented Case
View Patent ↗
Granted: May 9, 1989
Filed: Oct 22, 1987
Inventors
Klaus-Dieter Franz
Andrea Griessmann
Gisela Lenz
Gernot Moschl
Assignee (at issue)
Merck Patent GmbH
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.