Granted Patent
Utility
US 5,985,459 · App. 08/741,794
Method of treating razor blade cutting edges
Inventors:
Michael J. Kwiecien, Hoang Mai Trankiem, Charles R. Parent, John L. Howard
Patented Case
View Patent ↗
Granted: Nov 16, 1999
Filed: Oct 31, 1996
Inventors
Michael J. Kwiecien
Hoang Mai Trankiem
Charles R. Parent
John L. Howard
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.