Granted Patent
Utility
US 4,709,070 · App. 06/669,978
Process for improving activity of tellurium containing metal oxide catalysts
Inventors:
Yutaka Sasaki, Yutaka Kiyomiya, Toshio Nakamura
Patented Case
View Patent ↗
Granted: Nov 24, 1987
Filed: Nov 9, 1984
Inventors
Yutaka Sasaki
Yutaka Kiyomiya
Toshio Nakamura
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.