Granted Patent
Utility
US 6,506,340 · App. 08/069,867
Antifoaming device and method for extracorporeal blood processing
Inventors:
Chi-Chun Tsai, Robert E. Haynes
Patented Case
View Patent ↗
Granted: Jan 14, 2003
Filed: Jun 1, 1993
Inventors
Chi-Chun Tsai
Robert E. Haynes
Assignee (at issue)
COBE Cardiovascular, 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.