Granted Patent
Utility
US 6,225,047 · App. 09/100,302
Use of retentate chromatography to generate difference maps
Inventors:
T. William Hutchens, Tai-Tung Yip
Patented Case
View Patent ↗
Granted: May 1, 2001
Filed: Jun 19, 1998
Inventors
T. William Hutchens
Tai-Tung Yip
Assignee (at issue)
Ciphergen Biosystems, 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.