Granted Patent
Utility
US 5,849,257 · App. 08/829,612
Process for preparation of nitrous oxide
Inventors:
Kenji Fujiwara, Hideaki Nakamura, Hiroshi Kato, Susumu Yoshinaga, Kazuo Wakimura
Patented Case
View Patent ↗
Granted: Dec 15, 1998
Filed: Mar 31, 1997
Inventors
Kenji Fujiwara
Hideaki Nakamura
Hiroshi Kato
Susumu Yoshinaga
Kazuo Wakimura
Assignee (at issue)
MITSUI CHEMICALS, INC.
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.