Granted Patent
Utility
US 4,334,901 · App. 06/065,656
Respirator cartridge
Inventors:
Adolfo V. Ayes, John A. Jones
Patented Case
View Patent ↗
Granted: Jun 15, 1982
Filed: Aug 10, 1979
Inventors
Adolfo V. Ayes
John A. Jones
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.