Granted Patent
Utility
US 6,699,587 · App. 10/181,905
Rough surface finished metallic foil with good corrugation workability and catalyst support for exhaust gas purification
Inventors:
Kazutoshi Iwami, Masayuki Kasuya, Shuji Nagasaki, Mikio Yamanaka
Patented Case
View Patent ↗
Granted: Mar 2, 2004
Filed: Jul 19, 2002
Inventors
Kazutoshi Iwami
Masayuki Kasuya
Shuji Nagasaki
Mikio Yamanaka
Assignee (at issue)
NIPPON STEEL 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.