Granted Patent
Utility
US 6,111,642 · App. 09/160,557
Flow apertured intracavity laser particle detector
Inventors:
Richard K. DeFreez, Kenneth L. Girvin, Frederic Schildmeyer
Patented Case
View Patent ↗
Granted: Aug 29, 2000
Filed: Sep 24, 1998
Inventors
Richard K. DeFreez
Kenneth L. Girvin
Frederic Schildmeyer
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.