Granted Patent
Utility
US 6,251,153 · App. 09/345,592
Centrifugal air filter
Inventors:
Emery W. Neitzel, Alan Lorenz Breitenfeldt, Jared Clyde Wesenick
Patented Case
View Patent ↗
Granted: Jun 26, 2001
Filed: Jun 30, 1999
Inventors
Emery W. Neitzel
Alan Lorenz Breitenfeldt
Jared Clyde Wesenick
Assignee (at issue)
Greenheck Fan 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.