Granted Patent
Utility
US 4,654,022 · App. 06/824,480
Rinsing on a solid bowl centrifuge
Inventor:
Leonard Shapiro
Patented Case
View Patent ↗
Granted: Mar 31, 1987
Filed: Jan 31, 1986
Inventor
Leonard Shapiro
Assignee (at issue)
Pennwalt Corporation
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.