Granted Patent
Utility
US 4,521,234 · App. 06/515,370
Housing for high efficiency particulate air filters
Inventors:
William Peebles, Cecil W. Bowers
Patented Case
View Patent ↗
Granted: Jun 4, 1985
Filed: Jul 19, 1983
Inventors
William Peebles
Cecil W. Bowers
Assignee (at issue)
FLANDERS FILTERS, 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.