Granted Patent
Utility
US 6,071,444 · App. 08/979,447
Process for manufacture of perforated slab propellant
Inventors:
William J. Worrell, David A. Worrell, II, Joseph Michael Donckers, II
Patented Case
View Patent ↗
Granted: Jun 6, 2000
Filed: Nov 24, 1997
Inventors
William J. Worrell
David A. Worrell, II
Joseph Michael Donckers, II
Assignee (at issue)
Alliant Techsystems 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.