Granted Patent
Utility
US 5,173,310 · App. 07/639,034
Device for cooling molten filaments in spinning apparatus
Inventors:
Eiji Katou, Akifumi Katou, Yoshihiro Yoshimura
Patented Case
View Patent ↗
Granted: Dec 22, 1992
Filed: Jan 8, 1991
Inventors
Eiji Katou
Akifumi Katou
Yoshihiro Yoshimura
Assignee (at issue)
Mitsui Petrochemical Industries, Ltd.
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.