Granted Patent
Utility
US 4,558,015 · App. 06/698,052
Chemically resistant refractory fiber
Inventors:
Wendell G. Ekdahl, Asit R. Chaudhuri, William C. Miiller
Patented Case
View Patent ↗
Granted: Dec 10, 1985
Filed: Feb 4, 1985
Inventors
Wendell G. Ekdahl
Asit R. Chaudhuri
William C. Miiller
Assignee (at issue)
Manville Service 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.