Granted Patent
Utility
US 4,861,561 · App. 06/802,464
High speed extraction and treatment apparatus
Inventor:
F. D. Pritchard
Patented Case
View Patent ↗
Granted: Aug 29, 1989
Filed: Nov 27, 1985
Inventor
F. D. Pritchard
Assignee (at issue)
Burlington Industries LLC
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.