Granted Patent
Utility
US 4,619,803 · App. 06/633,313
Self-texturing nylon yarn spinning process
Inventor:
Jing-peir Yu
Patented Case
View Patent ↗
Granted: Oct 28, 1986
Filed: Jul 23, 1984
Inventor
Jing-peir Yu
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.