Granted Patent
Utility
US 4,152,885 · App. 05/812,202
Interlocked yarn and method of making same
Inventor:
Paul R. Cox, Jr.
Patented Case
View Patent ↗
Granted: May 8, 1979
Filed: Jul 1, 1977
Inventor
Paul R. Cox, Jr.
Assignee (at issue)
HERCULES LLC
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.