Granted Patent
Utility
US 6,174,603 · App. 09/383,018
Sheath-core bicomponent fibers with blended ethylene-vinyl acetate polymer sheath, tobacco smoke filter products incorporating such fibers and tobacco smoke products made therefrom
Inventor:
Richard M. Berger
Patented Case
View Patent ↗
Granted: Jan 16, 2001
Filed: Aug 25, 1999
Inventor
Richard M. Berger
Assignee (at issue)
Filtrona International Limited
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.