Granted Patent
Utility
US 4,780,502 · App. 06/937,585
Gold polish preparation
Inventors:
Marion Lotze, Dieter Frembs
Patented Case
View Patent ↗
Granted: Oct 25, 1988
Filed: Dec 3, 1986
Inventors
Marion Lotze
Dieter Frembs
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.