Granted Patent
Utility
US 4,913,869 · App. 07/289,142
Wet-spinning processes for producing acrylic filaments
Inventor:
Paul Funk
Patented Case
View Patent ↗
Granted: Apr 3, 1990
Filed: Dec 23, 1988
Inventor
Paul Funk
Assignee (at issue)
Monsanto 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.