Granted Patent
Utility
US 4,157,082 · App. 05/776,059
Self-purging fuel supply system for internal combustion engines
Inventor:
Ralph R. Day
Patented Case
View Patent ↗
Granted: Jun 5, 1979
Filed: Mar 9, 1977
Inventor
Ralph R. Day
Assignee (at issue)
Caterpillar Tractor Co.
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.