Granted Patent
Utility
US 6,399,699 · App. 08/799,411
Polyacetal resin composition excellent in aging resistance
Inventors:
Yukio Tanigawa, Tadashige Hata
Patented Case
View Patent ↗
Granted: Jun 4, 2002
Filed: Feb 12, 1997
Inventors
Yukio Tanigawa
Tadashige Hata
Assignee (at issue)
ASAHI KASEI KOGYO CO., LTD.
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.