Granted Patent
Utility
US 5,332,419 · App. 08/076,851
Pneumatic injection of powder or granule through submerged tuyeres
Inventors:
Raymond Lemay, Robert Vos
Patented Case
View Patent ↗
Granted: Jul 26, 1994
Filed: Jun 15, 1993
Inventors
Raymond Lemay
Robert Vos
Assignee (at issue)
Noranda Inc.
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.