Granted Patent
Utility
US 5,221,448 · App. 07/674,445
Buffer gradient and temperature gradient capillary electrophoresis
Inventors:
Scot R. Weinberger, Ernst Gassmann
Patented Case
View Patent ↗
Granted: Jun 22, 1993
Filed: Mar 25, 1991
Inventors
Scot R. Weinberger
Ernst Gassmann
Assignee (at issue)
Spectra-Physics Analytical, 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.