Granted Patent
Utility
US 4,973,646 · App. 07/506,055
Powder coating compositions
Inventors:
Jonathan Stewart Witzeman, Yeong-Ho Chang
Patented Case
View Patent ↗
Granted: Nov 27, 1990
Filed: Apr 9, 1990
Inventors
Jonathan Stewart Witzeman
Yeong-Ho Chang
Assignee (at issue)
EASTMAN KODAK COMPANY
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.