Granted Patent
Utility
US 4,919,710 · App. 07/157,618
Condensate drainage apparatus
Inventors:
Masao Seki, Hiroki Higashino
Patented Case
View Patent ↗
Granted: Apr 24, 1990
Filed: Feb 19, 1988
Inventors
Masao Seki
Hiroki Higashino
Assignees (at issue)
Mitsui Petrochemical Industries, Ltd.
Ciluck 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.