Granted Patent
Utility
US 5,266,255 · App. 07/923,072
Process for high stress spinning of polyester industrial yarn
Inventors:
John D. Gibbon, Norman K. Porter
Patented Case
View Patent ↗
Granted: Nov 30, 1993
Filed: Jul 31, 1992
Inventors
John D. Gibbon
Norman K. Porter
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.