Granted Patent
Utility
US 6,539,735 · App. 10/005,568
Refrigerant expansion tank
Inventor:
Douglas A. Schmidt
Patented Case
View Patent ↗
Granted: Apr 1, 2003
Filed: Dec 3, 2001
Inventor
Douglas A. Schmidt
Assignee (at issue)
Thermo Forma, 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.