Granted Patent
Utility
US 5,186,879 · App. 07/726,150
Spinning process for producing high strength, high modulus, low shrinkage yarns
Inventors:
F. Holmes Simons, Ronald L. Griffith
Patented Case
View Patent ↗
Granted: Feb 16, 1993
Filed: Jul 1, 1991
Inventors
F. Holmes Simons
Ronald L. Griffith
Assignee (at issue)
Hoechst Celanese Corporation
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.