Granted Patent
Utility
US 6,009,850 · App. 09/058,341
High-pressure dual-feed-rate injector pump with grooved port-closing edge
Inventor:
Frank DeLuca
Patented Case
View Patent ↗
Granted: Jan 4, 2000
Filed: Apr 10, 1998
Inventor
Frank DeLuca
Assignee (at issue)
Alfred J. Buescher
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.