Granted Patent
Utility
US 6,506,839 · App. 09/689,608
Elastomer composition
Inventors:
Hajime Nishihara, Shinichi Shibayama
Patented Case
View Patent ↗
Granted: Jan 14, 2003
Filed: Oct 13, 2000
Inventors
Hajime Nishihara
Shinichi Shibayama
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.