Granted Patent
Utility
US 4,407,306 · App. 06/331,676
Method for expanding tobacco with steam at high temperature and velocity
Inventor:
Charles H. Hibbitts
Patented Case
View Patent ↗
Granted: Oct 4, 1983
Filed: Dec 17, 1981
Inventor
Charles H. Hibbitts
Assignee (at issue)
American Brands LLC
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.