Granted Patent
Utility
US 5,051,088 · App. 07/179,781
Melt spinning machines
Inventor:
Richard Frank
Patented Case
View Patent ↗
Granted: Sep 24, 1991
Filed: Apr 11, 1988
Inventor
Richard Frank
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.