Granted Patent
Utility
US 4,757,038 · App. 07/052,226
Regeneration of iron-antimony metallic oxide catalysts
Inventors:
Yutaka Sasaki, Yutaka Kiyomiya, Toshio Nakamura, Yoshimi Nakamura, Masanori Yamaguchi
Patented Case
View Patent ↗
Granted: Jul 12, 1988
Filed: May 15, 1987
Inventors
Yutaka Sasaki
Yutaka Kiyomiya
Toshio Nakamura
Yoshimi Nakamura
Masanori Yamaguchi
Assignee (at issue)
Nitto Chemical Industry Co., Ltd.
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.