Granted Patent
Utility
US 5,356,574 · App. 08/118,742
Process for producing pitch based activated carbon fibers and carbon fibers
Inventors:
Toshio Tamaki, Hideyuki Nakajima, Yoshiyuki Nishimura, Hiroshi Ejiri
Patented Case
View Patent ↗
Granted: Oct 18, 1994
Filed: Sep 10, 1993
Inventors
Toshio Tamaki
Hideyuki Nakajima
Yoshiyuki Nishimura
Hiroshi Ejiri
Assignee (at issue)
Petoca, 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.