Granted Patent
Utility
US 4,375,520 · App. 06/252,764
Densification of particulate materials
Inventors:
Thomas W. Pennie, Sunil S. Parikh, Charles Lowe
Patented Case
View Patent ↗
Granted: Mar 1, 1983
Filed: Apr 10, 1981
Inventors
Thomas W. Pennie
Sunil S. Parikh
Charles Lowe
Assignee (at issue)
Dart Industries 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.