Granted Patent
Utility
US 5,368,542 · App. 08/180,433
Apparatus and method for separating microscopic units in a substantially continuous density gradient solution
Inventors:
John D. McMannis, Nicholas London
Patented Case
View Patent ↗
Granted: Nov 29, 1994
Filed: Jan 12, 1994
Inventors
John D. McMannis
Nicholas London
Assignee (at issue)
Cobe Laboratories, 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.