Granted Patent
Utility
US 5,343,767 · App. 07/851,570
Low particle loss cascade impactor
Inventors:
Virgil A. Marple, Nicholas C. Miller
Patented Case
View Patent ↗
Granted: Sep 6, 1994
Filed: Mar 16, 1992
Inventors
Virgil A. Marple
Nicholas C. Miller
Assignee (at issue)
MSP CORPORATION
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.