Granted Patent
Utility
US 6,258,259 · App. 09/488,710
Iron sulfide and process for producing the same
Inventors:
Tadashi Kai, Yuji Matsue, Masaaki Sakurai, Kunihiro Imada, Kenji Inokuchi
Patented Case
View Patent ↗
Granted: Jul 10, 2001
Filed: Jan 21, 2000
Inventors
Tadashi Kai
Yuji Matsue
Masaaki Sakurai
Kunihiro Imada
Kenji Inokuchi
Assignee (at issue)
Asashi Kasei Kabushiki Kaisha
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.