Granted Patent
Utility
US 6,744,503 · App. 10/022,239
Monitoring of vapor phase polycyclic aromatic hydrocarbons
Inventors:
Tuan Vo-Dinh, Mohammad R. Hajaligol
Patented Case
View Patent ↗
Granted: Jun 1, 2004
Filed: Dec 20, 2001
Inventors
Tuan Vo-Dinh
Mohammad R. Hajaligol
Assignee (at issue)
Philip Morris 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.