Granted Patent
Utility
US 6,433,089 · App. 09/701,295
Method for producing rubber composition
Inventors:
Hajime Nishihara, Shinichi Shibayama
Patented Case
View Patent ↗
Granted: Aug 13, 2002
Filed: Nov 28, 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.