Granted Patent
Utility
US 4,789,509 · App. 07/132,651
Method for fibrillating carbonaceous fibers
Inventors:
Takeshi Ikeda, Hideo Handa, Keisuke Nakano
Patented Case
View Patent ↗
Granted: Dec 6, 1988
Filed: Dec 10, 1987
Inventors
Takeshi Ikeda
Hideo Handa
Keisuke Nakano
Assignee (at issue)
Mitsubishi Chemical Industries, Ltd.
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.