Granted Patent
Utility
US 6,204,300 · App. 09/239,288
Low resilience urethane foam
Inventors:
Masakazu KAGEOKA, Katsumi Inaoka, Takashi Kumaki
Patented Case
View Patent ↗
Granted: Mar 20, 2001
Filed: Jan 29, 1999
Inventors
Masakazu KAGEOKA
Katsumi Inaoka
Takashi Kumaki
Assignee (at issue)
Takeda Chemical Industries 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.