Granted Patent
Utility
US 4,538,921 · App. 06/555,322
Apparatus and method for slurrying soda ash
Inventor:
David Kennedy
Patented Case
View Patent ↗
Granted: Sep 3, 1985
Filed: Nov 25, 1983
Inventor
David Kennedy
Assignee (at issue)
ALLIED CONSULTING, 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.