Granted Patent
Utility
US 4,999,238 · App. 07/338,520
Damage tolerant composites containing infusible particles
Inventor:
Irena Gawin
Patented Case
View Patent ↗
Granted: Mar 12, 1991
Filed: Apr 3, 1989
Inventor
Irena Gawin
Assignee (at issue)
HERCULES LLC
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.