Granted Patent
Utility
US 5,238,401 · App. 07/679,461
Slagging rotary kiln
Inventors:
Raymond J. Frericks, Johnny H. Price, Jr.
Patented Case
View Patent ↗
Granted: Aug 24, 1993
Filed: Apr 2, 1991
Inventors
Raymond J. Frericks
Johnny H. Price, Jr.
Assignee (at issue)
Westinghouse Electric Company LLC
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.