Granted Patent
Utility
US 5,046,919 · App. 07/560,003
High efficiency turboexpander
Inventor:
James B. Wulf
Patented Case
View Patent ↗
Granted: Sep 10, 1991
Filed: Jul 27, 1990
Inventor
James B. Wulf
Assignee (at issue)
Union Carbide Industrial Gases Technology Corporation
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.