Granted Patent
Utility
US 4,595,623 · App. 06/607,847
Fiber-reinforced syntactic foam composites and method of forming same
Inventors:
Preston S. Du Pont, Janet E. Freeman, Robert E. Ritter, Alois Wittmann
Patented Case
View Patent ↗
Granted: Jun 17, 1986
Filed: May 7, 1984
Inventors
Preston S. Du Pont
Janet E. Freeman
Robert E. Ritter
Alois Wittmann
Assignee (at issue)
Hughes Aircraft 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.