Granted Patent
Utility
US 4,422,861 · App. 06/345,955
Aerosol filter cartridge
Inventor:
Robert J. Dusza
Patented Case
View Patent ↗
Granted: Dec 27, 1983
Filed: Feb 5, 1982
Inventor
Robert J. Dusza
Assignee (at issue)
American Optical 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.