Granted Patent
Utility
US 4,582,302 · App. 06/637,368
Suspended tuyere stock removal device
Inventors:
Pierre Mailliet, Edgar Kraemer
Patented Case
View Patent ↗
Granted: Apr 15, 1986
Filed: Dec 12, 1983
Inventors
Pierre Mailliet
Edgar Kraemer
Assignee (at issue)
PAUL WURTH S.A.
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.