Granted Patent
Utility
US 6,326,451 · App. 09/513,201
Acrylonitrile-based precursor fiber for the formation of carbon fiber, process for preparing same, and carbon formed from same
Inventors:
Mitsuo Hamada, Yoshihiko Hosako, Teruyuki Yamada, Tatsuzi Shimizu
Patented Case
View Patent ↗
Granted: Dec 4, 2001
Filed: Feb 25, 2000
Inventors
Mitsuo Hamada
Yoshihiko Hosako
Teruyuki Yamada
Tatsuzi Shimizu
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.