Granted Patent
Utility
US 4,020,539 · App. 05/561,528
Catalytic reactor for automobile
Inventor:
William Vroman
Patented Case
View Patent ↗
Granted: May 3, 1977
Filed: Mar 24, 1975
Inventor
William Vroman
Assignee (at issue)
Chrysler Group LLC
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.