Granted Patent
Utility
US 4,536,409 · App. 06/228,089
Oxygen scavenger
Inventors:
Christopher John Farrell, Boh C. Tsai
Patented Case
View Patent ↗
Granted: Aug 20, 1985
Filed: Jan 23, 1981
Inventors
Christopher John Farrell
Boh C. Tsai
Assignee (at issue)
American Can Company
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.