Granted Patent
Utility
US 6,530,237 · App. 09/824,530
Refrigeration system pressure control using a gas volume
Inventors:
Douglas Morse, James A. O'Neil
Patented Case
View Patent ↗
Granted: Mar 11, 2003
Filed: Apr 2, 2001
Inventors
Douglas Morse
James A. O'Neil
Assignee (at issue)
Helix Technology 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.