Granted Patent
Utility
US 5,277,250 · App. 07/929,110
Injector quill
Inventor:
Steven A. Dela
Patented Case
View Patent ↗
Granted: Jan 11, 1994
Filed: Sep 30, 1992
Inventor
Steven A. Dela
Assignee (at issue)
Nalco Chemical 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.