Granted Patent
Utility
US 5,022,964 · App. 07/362,054
Nonwoven fibrous web for tobacco filter
Inventors:
L. Paul Crane, H. Clark Lind, Martine E. Frederix
Patented Case
View Patent ↗
Granted: Jun 11, 1991
Filed: Jun 6, 1989
Inventors
L. Paul Crane
H. Clark Lind
Martine E. Frederix
Assignees (at issue)
THE DEXTER COMPANY
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.