Granted Patent
Utility
US 6,070,428 · App. 09/087,008
Stack type evaporator
Inventors:
Naohisa Higashiyama, Nobuyuki Okuda
Patented Case
View Patent ↗
Granted: Jun 6, 2000
Filed: May 29, 1998
Inventors
Naohisa Higashiyama
Nobuyuki Okuda
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.