Granted Patent
Utility
US 5,138,765 · App. 07/666,276
Method of making an enhanced hydraulically expanded heat exchanger
Inventors:
George B. Watson, Jamal Righi
Patented Case
View Patent ↗
Granted: Aug 18, 1992
Filed: Mar 7, 1991
Inventors
George B. Watson
Jamal Righi
Assignee (at issue)
The Babcock & Wilson Company
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.