Granted Patent
Utility
US 5,913,768 · App. 08/676,039
Particle filter apparatus
Inventors:
Robert W. Langley, Dennis J. Hlavinka, Linda A. Taylor, John C. Walker
Patented Case
View Patent ↗
Granted: Jun 22, 1999
Filed: Jul 5, 1996
Inventors
Robert W. Langley
Dennis J. Hlavinka
Linda A. Taylor
John C. Walker
Assignee (at issue)
Cobe Laboratories, 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.