Granted Patent
Utility
US 4,960,581 · App. 07/322,415
Method for preparing gaseous metallic fluoride
Inventors:
Isao Harada, Yukihiro Yoda, Naruyuki Iwanaga, Toshihiko Nishitsuji, Akio Kikkawa
Patented Case
View Patent ↗
Granted: Oct 2, 1990
Filed: Mar 13, 1989
Inventors
Isao Harada
Yukihiro Yoda
Naruyuki Iwanaga
Toshihiko Nishitsuji
Akio Kikkawa
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.