Granted Patent
Utility
US 5,077,979 · App. 07/497,379
Two-stage Joule-Thomson cryostat with gas supply management system, and uses thereof
Inventors:
Matthew M. Skertic, Joseph L. Hlava
Patented Case
View Patent ↗
Granted: Jan 7, 1992
Filed: Mar 22, 1990
Inventors
Matthew M. Skertic
Joseph L. Hlava
Assignee (at issue)
Hughes Aircraft 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.