Granted Patent
Utility
US 6,701,936 · App. 09/853,406
Cigarette with smoke constituent attenuator
Inventors:
Kenneth H. Shafer, San Li, Milton E. Parrish, Susan E. Plunkett
Patented Case
View Patent ↗
Granted: Mar 9, 2004
Filed: May 11, 2001
Inventors
Kenneth H. Shafer
San Li
Milton E. Parrish
Susan E. Plunkett
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.