Granted Patent
Utility
US 4,432,867 · App. 06/206,514
Method and apparatus for separating particulate materials from fibrous materials
Inventor:
Sanford N. Smith
Patented Case
View Patent ↗
Granted: Feb 21, 1984
Filed: Nov 13, 1980
Inventor
Sanford N. Smith
Assignee (at issue)
Phillips Petroleum 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.