Granted Patent
Utility
US 5,672,421 · App. 08/662,428
Heterofilaments for cord reinforcement in rubber goods
Inventor:
Harry W. Stanhope
Patented Case
View Patent ↗
Granted: Sep 30, 1997
Filed: Aug 19, 1996
Inventor
Harry W. Stanhope
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.