Granted Patent
Utility
US 5,511,955 · App. 08/384,970
Cryogenic pump
Inventors:
Bruce G. Brown, Robert E. Crowl, Phillip J. Westermann
Patented Case
View Patent ↗
Granted: Apr 30, 1996
Filed: Feb 7, 1995
Inventors
Bruce G. Brown
Robert E. Crowl
Phillip J. Westermann
Assignee (at issue)
Cryogenic Group, Inc.
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.