Granted Patent
Utility
US 4,957,159 · App. 07/323,741
Aluminum heat exchanger provided with fins having hydrophilic coating
Inventors:
Masaaki Mizoguchi, Susumu Inoue, Tatsuo Otsuka, Eizo Isoyama
Patented Case
View Patent ↗
Granted: Sep 18, 1990
Filed: Mar 15, 1989
Inventors
Masaaki Mizoguchi
Susumu Inoue
Tatsuo Otsuka
Eizo Isoyama
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.