Granted Patent
Utility
US 6,564,808 · App. 09/635,775
Method for reduction of tobacco specific nitrosamines
Inventors:
Walter Hempfling, Gordon H. Bokelman, Newton E. Kalengamaliro, Dick Hilliard
Patented Case
View Patent ↗
Granted: May 20, 2003
Filed: Aug 11, 2000
Inventors
Walter Hempfling
Gordon H. Bokelman
Newton E. Kalengamaliro
Dick Hilliard
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.