Granted Patent
Utility
US 4,495,301 · App. 06/482,648
Insulating refractories
Inventor:
Peter T. Sutor
Patented Case
View Patent ↗
Granted: Jan 22, 1985
Filed: Apr 6, 1983
Inventor
Peter T. Sutor
Assignee (at issue)
Dresser Industries, 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.