Granted Patent
Utility
US 4,878,431 · App. 06/832,110
Elastomeric insulating materials for rocket motors
Inventor:
Liles G. Herring
Patented Case
View Patent ↗
Granted: Nov 7, 1989
Filed: Feb 21, 1986
Inventor
Liles G. Herring
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.