Granted Patent
Utility
US 6,448,574 · App. 09/524,681
Method and apparatus for determining liquid levels in a liquid sample container
Inventor:
Allan Tit-Shing Chow
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: Mar 14, 2000
Inventor
Allan Tit-Shing Chow
Assignee (at issue)
Dade Behring 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.