Granted Patent
Utility
US 4,381,958 · App. 06/176,211
Triaminoguanidine nitrate-containing propellants
Inventor:
William M. Howard
Patented Case
View Patent ↗
Granted: May 3, 1983
Filed: Aug 7, 1980
Inventor
William M. Howard
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.