Granted Patent
Utility
US 6,733,881 · App. 10/429,821
Acrylic fiber and a manufacturing process therefor
Inventors:
Yukio Kasabo, Katsuhiko Ikeda, Yasuyuki Fujii, Yoshihiko Mishina, Ryo Ochi
Patented Case
View Patent ↗
Granted: May 11, 2004
Filed: May 6, 2003
Inventors
Yukio Kasabo
Katsuhiko Ikeda
Yasuyuki Fujii
Yoshihiko Mishina
Ryo Ochi
Assignee (at issue)
MITSUBISHI ELECTRIC 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.