Granted Patent
Utility
US 4,931,328 · App. 07/234,456
Capillary tube with reduced protein interactions and controllable electroosmotic flow
Inventor:
Sally A. Swedberg
Patented Case
View Patent ↗
Granted: Jun 5, 1990
Filed: Aug 19, 1988
Inventor
Sally A. Swedberg
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.