Granted Patent
Utility
US 4,530,881 · App. 06/469,147
Fluoroelastomer-based friction material having improved frictional properties
Inventors:
Muljadi Santoso, John Anderson
Patented Case
View Patent ↗
Granted: Jul 23, 1985
Filed: Feb 24, 1983
Inventors
Muljadi Santoso
John Anderson
Assignee (at issue)
Raymark 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.