Granted Patent
Utility
US 6,595,368 · App. 09/733,111
Pre-separator for inlets of cascade impactors
Inventors:
Daryl L. Roberts, Virgil A. Marple
Patented Case
View Patent ↗
Granted: Jul 22, 2003
Filed: Dec 8, 2000
Inventors
Daryl L. Roberts
Virgil A. Marple
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.