Granted Patent
Utility
US 5,800,597 · App. 08/786,808
Integral coalescer filter-membrane device to provide a filtered gas stream and system employing such device
Inventors:
Kenneth A. Perrotta, Dean Hoyt
Patented Case
View Patent ↗
Granted: Sep 1, 1998
Filed: Jan 21, 1997
Inventors
Kenneth A. Perrotta
Dean Hoyt
Assignee (at issue)
Whatman GmbH
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.