Granted Patent
Utility
US 5,800,673 · App. 08/546,961
Stack type evaporator
Inventors:
Nobuyuki Okuda, Masahiro Kojima
Patented Case
View Patent ↗
Granted: Sep 1, 1998
Filed: Oct 23, 1995
Inventors
Nobuyuki Okuda
Masahiro Kojima
Assignee (at issue)
Showa Aluminum Corp.
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.