Granted Patent
Utility
US 6,528,599 · App. 09/549,037
Method for preparing living polymer in the presence of phosphazenium salt
Inventors:
Tadahito Nobori, Atsushi Shibahara, Shinji Kiyono, Takaomi Hayashi, Katsuhiko Funaki, Isao Hara, Kazumi Mizutani, Usaji Takaki
Patented Case
View Patent ↗
Granted: Mar 4, 2003
Filed: Apr 13, 2000
Inventors
Tadahito Nobori
Atsushi Shibahara
Shinji Kiyono
Takaomi Hayashi
Katsuhiko Funaki
Isao Hara
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.