Granted Patent
Utility
US 5,256,358 · App. 07/911,360
Method of making stretched filaments of ultra-high-molecular weight polyethylene
Inventors:
Takeshi Shiraki, Yoshihiro Yoshimura, Koji Nakashima
Patented Case
View Patent ↗
Granted: Oct 26, 1993
Filed: Jul 9, 1992
Inventors
Takeshi Shiraki
Yoshihiro Yoshimura
Koji Nakashima
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.