Granted Patent
Utility
US 4,405,548 · App. 06/281,739
Process for filtering molten polymer
Inventor:
Arnold J. Cobb
Patented Case
View Patent ↗
Granted: Sep 20, 1983
Filed: Jul 9, 1981
Inventor
Arnold J. Cobb
Assignee (at issue)
Fiber Industries, Inc.
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.