Granted Patent
Utility
US 5,580,459 · App. 07/999,031
Filtration structures of wet laid, bicomponent fiber
Inventors:
Edward J. Powers, Steve Nielsen, Jeanne E. Smith, Theodore S. Thornburg
Patented Case
View Patent ↗
Granted: Dec 3, 1996
Filed: Dec 31, 1992
Inventors
Edward J. Powers
Steve Nielsen
Jeanne E. Smith
Theodore S. Thornburg
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.