Granted Patent
Utility
US 5,131,997 · App. 07/522,278
Capillary zone electrophoresis cassette
Inventors:
John A. Christianson, Douglass McManigill, James E. Young
Patented Case
View Patent ↗
Granted: Jul 21, 1992
Filed: May 11, 1990
Inventors
John A. Christianson
Douglass McManigill
James E. Young
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.