Granted Patent
Utility
US 4,367,139 · App. 05/961,342
Hollow fiber permeator
Inventor:
Tommy E. Graham
Patented Case
View Patent ↗
Granted: Jan 4, 1983
Filed: Nov 16, 1978
Inventor
Tommy E. Graham
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.