Granted Patent
Utility
US 5,439,741 · App. 08/285,460
Heterofilament composite yarn
Inventors:
John D. Gibbon, Stephan Fredrick Sherriff
Patented Case
View Patent ↗
Granted: Aug 8, 1995
Filed: Aug 3, 1994
Inventors
John D. Gibbon
Stephan Fredrick Sherriff
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.