Granted Patent
Utility
US 4,755,301 · App. 06/895,645
Apparatus and method for centrifugal recovery of retentate
Inventor:
William F. Bowers
Patented Case
View Patent ↗
Granted: Jul 5, 1988
Filed: Aug 12, 1986
Inventor
William F. Bowers
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.