Granted Patent
Utility
US 6,228,428 · App. 08/232,197
Coating cutting edges with fluorocarbon polymers
Inventor:
Hoang Mai Trankiem
Patented Case
View Patent ↗
Granted: May 8, 2001
Filed: Apr 28, 1994
Inventor
Hoang Mai Trankiem
Assignee (at issue)
The Gillette Company LLC
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.