Granted Patent
Utility
US 6,823,873 · App. 10/078,536
Cigarette having reduced sidestream smoke
Inventors:
Walter A. Nichols, John R. Hearn, F. Murphy Sprinkel, Jr., Jay A Fournier, Jerry F. Whidby
Patented Case
View Patent ↗
Granted: Nov 30, 2004
Filed: Feb 21, 2002
Inventors
Walter A. Nichols
John R. Hearn
F. Murphy Sprinkel, Jr.
Jay A Fournier
Jerry F. Whidby
Assignee (at issue)
Philip Morris USA 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.