Granted Patent
Utility
US 4,749,479 · App. 06/600,256
Apparatus for separation of liquids and solids using fabrics
Inventor:
Lew T. Gray
Patented Case
View Patent ↗
Granted: Jun 7, 1988
Filed: Apr 13, 1984
Inventor
Lew T. Gray
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.