Granted Patent
Utility
US 4,930,986 · App. 06/629,526
Apparatus for immersing solids into fluids and moving fluids in a linear direction
Inventor:
Paul V. Cooper
Patented Case
View Patent ↗
Granted: Jun 5, 1990
Filed: Jul 10, 1984
Inventor
Paul V. Cooper
Assignee (at issue)
Carborundum 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.