Granted Patent
Utility
US 4,721,459 · App. 06/880,599
Modular, insulating kiln car top
Inventor:
Albert E. Fitz
Patented Case
View Patent ↗
Granted: Jan 26, 1988
Filed: Jun 30, 1986
Inventor
Albert E. Fitz
Assignee (at issue)
Ferro Corporation
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.