Granted Patent
Utility
US 4,971,078 · App. 07/394,341
Filter for a smoking article containing a flavored hollow fiber
Inventors:
Lance J. Deutsch, Cheryl Johnson
Patented Case
View Patent ↗
Granted: Nov 20, 1990
Filed: Aug 15, 1989
Inventors
Lance J. Deutsch
Cheryl Johnson
Assignee (at issue)
Hoechst Celanese Corporation
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.