Granted Patent
Utility
US 4,650,587 · App. 06/416,771
Ammonia scavenger
Inventors:
Robert Polak, Craig R. Hof
Patented Case
View Patent ↗
Granted: Mar 17, 1987
Filed: Sep 9, 1982
Inventors
Robert Polak
Craig R. Hof
Assignee (at issue)
Akzona Incorporated
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.