Granted Patent
Utility
US 6,197,421 · App. 09/520,998
Carbon fiber-reinforced resin composition
Inventors:
Iwao Yamamoto, Akihiko Yoshiya, Tadahiro Nishimoto
Patented Case
View Patent ↗
Granted: Mar 6, 2001
Filed: Mar 8, 2000
Inventors
Iwao Yamamoto
Akihiko Yoshiya
Tadahiro Nishimoto
Assignee (at issue)
MITSUBISHI CHEMICAL 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.