Granted Patent
Utility
US 4,670,341 · App. 06/735,020
Hollow fiber
Inventor:
Christian B. Lundsager
Patented Case
View Patent ↗
Granted: Jun 2, 1987
Filed: May 17, 1985
Inventor
Christian B. Lundsager
Assignee (at issue)
W. R. Grace & Co.
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.