Granted Patent
Utility
US 6,137,572 · App. 09/183,582
High sensitivity optical fluid-borne particle detection
Inventors:
Richard K. DeFreez, Kenneth L. Girvin, Mingguang Li
Patented Case
View Patent ↗
Granted: Oct 24, 2000
Filed: Oct 30, 1998
Inventors
Richard K. DeFreez
Kenneth L. Girvin
Mingguang Li
Assignee (at issue)
Pacific Scientific Instruments Company
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.