Granted Patent
Utility
US 6,489,373 · App. 09/411,177
Method for decomposition and recovery of polyurethane resin
Inventors:
Katsuhisa Kodama, Kouichi Murayama, Takashi Kumaki
Patented Case
View Patent ↗
Granted: Dec 3, 2002
Filed: Oct 1, 1999
Inventors
Katsuhisa Kodama
Kouichi Murayama
Takashi Kumaki
Assignee (at issue)
Mitsui Takeda 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.