Granted Patent
Utility
US 6,383,564 · App. 09/471,400
Method for forming a porous covering layer on a substrate
Inventor:
Naka Hirayama
Patented Case
View Patent ↗
Granted: May 7, 2002
Filed: Dec 23, 1999
Inventor
Naka Hirayama
Assignee (at issue)
NITTO KOGYO CORPORATION
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.