Granted Patent
Utility
US 5,353,567 · App. 08/047,034
Insulation module assembly and apparatus for installation
Inventors:
Curtis L. Knight, Robert W. Caffey
Patented Case
View Patent ↗
Granted: Oct 11, 1994
Filed: Apr 12, 1993
Inventors
Curtis L. Knight
Robert W. Caffey
Assignee (at issue)
Premier Refractories and Chemicals 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.