Granted Patent
Utility
US 6,346,574 · App. 09/610,486
Fire retardance-imparting additive
Inventor:
Hajime Nishihara
Patented Case
View Patent ↗
Granted: Feb 12, 2002
Filed: Jul 5, 2000
Inventor
Hajime Nishihara
Assignee (at issue)
ASAHI 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.