Granted Patent
Utility
US 4,388,422 · App. 06/030,253
Fiber-reinforced composite materials
Inventors:
Steven R. Gerteisen, David R. Wetzel
Patented Case
View Patent ↗
Granted: Jun 14, 1983
Filed: Apr 16, 1979
Inventors
Steven R. Gerteisen
David R. Wetzel
Assignee (at issue)
Dart 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.