Granted Patent
Utility
US 6,515,036 · App. 09/822,202
Method of decomposing a polyurethane
Inventors:
Koichi Murayama, Katsuhisa Kodama, Takashi Kumaki
Patented Case
View Patent ↗
Granted: Feb 4, 2003
Filed: Apr 2, 2001
Inventors
Koichi Murayama
Katsuhisa Kodama
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.