Granted Patent
Utility
US 5,147,197 · App. 07/633,810
Sealing plate for a spinnerette assembly
Inventors:
John A. Hodan, Robert N. Armstrong, Robert E. First
Patented Case
View Patent ↗
Granted: Sep 15, 1992
Filed: Dec 26, 1990
Inventors
John A. Hodan
Robert N. Armstrong
Robert E. First
Assignee (at issue)
BASF SE
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.