Granted Patent
Utility
US 5,143,977 · App. 07/668,138
Resin or rubber article reinforced with a polyolefin fiber having improved initial elongation
Inventors:
Kazuo Yagi, Hiroyuki Takeda
Patented Case
View Patent ↗
Granted: Sep 1, 1992
Filed: Mar 11, 1991
Inventors
Kazuo Yagi
Hiroyuki Takeda
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.