Granted Patent
Utility
US 4,904,158 · App. 07/233,379
Method and apparatus for cryogenic liquid expansion
Inventor:
Leslie C. Kun
Patented Case
View Patent ↗
Granted: Feb 27, 1990
Filed: Aug 18, 1988
Inventor
Leslie C. Kun
Assignee (at issue)
Union Carbide 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.