Granted Patent
Utility
US 4,288,207 · App. 06/164,425
Apparatus for producing melt-spun filaments
Inventor:
William W. Wilkes
Patented Case
View Patent ↗
Granted: Sep 8, 1981
Filed: Jun 30, 1980
Inventor
William W. Wilkes
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.