Granted Patent
Utility
US 5,651,810 · App. 08/324,072
Apparatus and method for filtering and sampling airborne respiratory contaminants
Inventors:
Dennis K. Flaherty, Russel P. Gordon, Paul M. Taylor, Frank D. Zielinski
Patented Case
View Patent ↗
Granted: Jul 29, 1997
Filed: Oct 14, 1994
Inventors
Dennis K. Flaherty
Russel P. Gordon
Paul M. Taylor
Frank D. Zielinski
Assignee (at issue)
Monsanto 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.