Granted Patent
Utility
US 6,766,680 · App. 10/046,240
Determination of gas solubility, entrained gas content, and true liquid density in manufacturing processes
Inventors:
Qingyuan Chen, Robert Josef Franda
Patented Case
View Patent ↗
Granted: Jul 27, 2004
Filed: Jan 16, 2002
Inventors
Qingyuan Chen
Robert Josef Franda
Assignee (at issue)
Appleton Papers 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.