Granted Patent
Utility
US 4,846,377 · App. 07/045,411
Limp, porous membrane for a fluidized outlet
Inventors:
Perry D. Fix, William Boyd Rogers
Patented Case
View Patent ↗
Granted: Jul 11, 1989
Filed: May 4, 1987
Inventors
Perry D. Fix
William Boyd Rogers
Assignee (at issue)
ACF Industries Incorporated
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.