Granted Patent
Utility
US 4,569,764 · App. 06/260,459
Collection device with phase partitioning means
Inventor:
Fred E. Satchell
Patented Case
View Patent ↗
Granted: Feb 11, 1986
Filed: May 4, 1981
Inventor
Fred E. Satchell
Assignee (at issue)
Sherwood Medical 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.