Granted Patent
Utility
US 5,785,901 · App. 08/861,381
Gas-liquid contact apparatus
Inventors:
Shigeo Hasegawa, Noohiko Ukawa, Kenji Iwasaki, Tamotsu Higuchi, Koichiro Iwashita
Patented Case
View Patent ↗
Granted: Jul 28, 1998
Filed: May 21, 1997
Inventors
Shigeo Hasegawa
Noohiko Ukawa
Kenji Iwasaki
Tamotsu Higuchi
Koichiro Iwashita
Assignee (at issue)
MITSUBISHI ELECTRIC 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.