Granted Patent
Utility
US 4,720,529 · App. 06/844,304
UV-ray curable polyurethane composition and coated optical fiber
Inventors:
Takao Kimura, Shinzo Yamakawa, Ryotaro Ohono
Patented Case
View Patent ↗
Granted: Jan 19, 1988
Filed: Mar 26, 1986
Inventors
Takao Kimura
Shinzo Yamakawa
Ryotaro Ohono
Assignees (at issue)
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Japan Synthetic Rubber 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.