Granted Patent
Utility
US 6,177,593 · App. 09/216,864
[Tris(dimethylamino)phosphonioamino]tris[tris(dimethylamino)phosphoranylide neamino]phosphonium dichloride and preparation process thereof
Inventors:
Tadahito Nobori, Takaomi Hayashi, Katsuhiko Funaki, Atsushi Shibahara, Isao Hara, Shinji Kiyono, Kazumi Mizutani, Usaji Takaki
Patented Case
View Patent ↗
Granted: Jan 23, 2001
Filed: Dec 21, 1998
Inventors
Tadahito Nobori
Takaomi Hayashi
Katsuhiko Funaki
Atsushi Shibahara
Isao Hara
Shinji Kiyono
Kazumi Mizutani
Usaji Takaki
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.