Granted Patent
Utility
US 4,994,231 · App. 07/497,173
Apparatus for blending constituents of varying densities
Inventors:
Thomas A. Artman, Carroll E. Allcock, Garry Garner, Gary Lee Jones, William R. Larsen, Steven N. Zartman
Patented Case
View Patent ↗
Granted: Feb 19, 1991
Filed: Mar 22, 1990
Inventors
Thomas A. Artman
Carroll E. Allcock
Garry Garner
Gary Lee Jones
William R. Larsen
Steven N. Zartman
Assignee (at issue)
The Babcock & Wilcox Company
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.