Granted Patent
Utility
US 6,769,437 · App. 10/117,220
Use of oxyhydroxide compounds for reducing carbon monoxide in the mainstream smoke of a cigarette
Inventors:
Mohammad R. Hajaligol, Ping Li
Patented Case
View Patent ↗
Granted: Aug 3, 2004
Filed: Apr 8, 2002
Inventors
Mohammad R. Hajaligol
Ping Li
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.