Granted Patent
Utility
US 6,506,838 · App. 09/695,425
Modified oxymethylene polymers
Inventor:
Toshiharu Seyama
Patented Case
View Patent ↗
Granted: Jan 14, 2003
Filed: Oct 25, 2000
Inventor
Toshiharu Seyama
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.