Granted Patent
Utility
US 4,640,848 · App. 06/770,333
Spray-applied ceramic fiber insulation
Inventors:
Juan M. Cerdan-Diaz, Michael Sanders, Mark E. Wellar
Patented Case
View Patent ↗
Granted: Feb 3, 1987
Filed: Aug 26, 1985
Inventors
Juan M. Cerdan-Diaz
Michael Sanders
Mark E. Wellar
Assignee (at issue)
Kennecott Holdings Company
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.