Granted Patent
Utility
US 6,313,194 · App. 08/725,506
Degrading method of polymer
Inventors:
Tadashi Yagi, Kazuto Ishihara, Takeshi Irimajiri
Patented Case
View Patent ↗
Granted: Nov 6, 2001
Filed: Oct 4, 1996
Inventors
Tadashi Yagi
Kazuto Ishihara
Takeshi Irimajiri
Assignee (at issue)
MITSUI CHEMICALS, INC.
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.