Granted Patent
Utility
US 4,758,649 · App. 07/049,253
Heat resistant organic synthetic fibers and process for producing the same
Inventors:
Shoji Asano, Akio Ohmory, Akitsugu Akiyama, Masanori Osawa, Kohei Shizuka, Masahiro Kouno
Patented Case
View Patent ↗
Granted: Jul 19, 1988
Filed: May 13, 1987
Inventors
Shoji Asano
Akio Ohmory
Akitsugu Akiyama
Masanori Osawa
Kohei Shizuka
Masahiro Kouno
Assignees (at issue)
KURARAY CO., LTD.
Mitsui Toatsu Chemicals, Incorporated
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.