Granted Patent
Utility
US 4,962,880 · App. 07/504,040
Method of forming a heat exchanger with components comprising an aluminum alloy containing reduced amounts of magnesium
Inventors:
Ichiro Iwai, Shigekazu Nagai, Tatsuo Otsuka
Patented Case
View Patent ↗
Granted: Oct 16, 1990
Filed: Apr 3, 1990
Inventors
Ichiro Iwai
Shigekazu Nagai
Tatsuo Otsuka
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.