Granted Patent
Utility
US 4,822,679 · App. 06/925,580
Spray-applied ceramic fiber insulation
Inventors:
Juan M. Cerdan-Diaz, Michael Sanders, Mark E. Wellar
Patented Case
View Patent ↗
Granted: Apr 18, 1989
Filed: Jan 13, 1987
Inventors
Juan M. Cerdan-Diaz
Michael Sanders
Mark E. Wellar
Assignee (at issue)
Stemcor 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.