Granted Patent
Utility
US 4,152,270 · App. 05/812,533
Phase separation device
Inventor:
William D. Cornell
Patented Case
View Patent ↗
Granted: May 1, 1979
Filed: Jul 1, 1977
Inventor
William D. Cornell
Assignee (at issue)
Sherwood Medical Industries Inc.
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.