Granted Patent
Utility
US 4,400,276 · App. 06/229,229
Apparatus having tube sheets for hollow fibers
Inventors:
Wayne A. Bollinger, Roger G. Guay
Patented Case
View Patent ↗
Granted: Aug 23, 1983
Filed: Jan 28, 1981
Inventors
Wayne A. Bollinger
Roger G. Guay
Assignee (at issue)
Monsanto Company
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.