Granted Patent
Utility
US 6,474,137 · App. 09/462,102
Measuring relative density of a gas
Inventors:
Paul Stephen Hammond, Robert Thurston
Patented Case
View Patent ↗
Granted: Nov 5, 2002
Filed: Feb 3, 2000
Inventors
Paul Stephen Hammond
Robert Thurston
Assignee (at issue)
Lattice Intellectual Property, Ltd.
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.