Granted Patent
Utility
US 5,401,468 · App. 08/184,011
Dual flow path carbon particulate monitor
Inventors:
Harvey Patashnick, Georg Rupprecht
Patented Case
View Patent ↗
Granted: Mar 28, 1995
Filed: Jan 18, 1994
Inventors
Harvey Patashnick
Georg Rupprecht
Assignee (at issue)
Rupprecht & Patashnick Company, 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.